Noel v. Thrifty Payless, Inc. , 7 Cal. 5th 955 ( 2019 )


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  •         IN THE SUPREME COURT OF
    CALIFORNIA
    DIANA NIEVES NOEL,
    Plaintiff and Appellant,
    v.
    THRIFTY PAYLESS, INC.,
    Defendant and Respondent.
    S246490
    First Appellate District, Division Four
    A143026
    Marin County Superior Court
    CIV1304712
    July 29, 2019
    Chief Justice Cantil-Sakauye authored the opinion of the
    Court, in which Justices Chin, Corrigan, Liu, Cuéllar, Kruger,
    and Groban concurred.
    NOEL v. THRIFTY PAYLESS, INC.
    S246490
    Opinion of the Court by Cantil-Sakauye, C. J.
    This case is a putative class action brought on behalf of
    retail purchasers of an inflatable outdoor pool sold in packaging
    that allegedly misled buyers about the pool’s size. We must
    decide whether the trial court abused its discretion when it
    denied the representative plaintiff’s motion for class
    certification on the basis that he had not supplied evidence
    showing how class members might be individually identified
    when the time came to do so. The Court of Appeal upheld this
    ruling. It reasoned that this evidence was necessary to ensure
    that proper notice would be given to the class, and that without
    it, the trial court could appropriately conclude that plaintiff had
    not satisfied the ascertainability requirement for class
    certification.
    We conclude that the trial court erred in demanding that
    plaintiff offer such evidence to satisfy the ascertainability
    requirement. Plaintiff’s proposed class definition articulates an
    ascertainable class, in that it defines the class “in terms of
    objective characteristics and common transactional facts” that
    make “the ultimate identification of class members possible
    when that identification becomes necessary.”           (Hicks v.
    Kaufman & Broad Home Corp. (2001) 
    89 Cal.App.4th 908
    , 915
    (Hicks).) As we will explain, the ascertainability requirement
    does not incorporate the additional evidentiary burden that the
    courts below would have imposed. We therefore reverse the
    1
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    judgment of the Court of Appeal and remand the matter for
    further proceedings consistent with our opinion.
    I. BACKGROUND
    In November 2013, plaintiff James Noel1 filed a verified
    complaint in Marin County Superior Court, alleging claims
    under the unfair competition law (Bus. & Prof. Code, § 17200 et
    seq.) (UCL), the false advertising law (Bus. & Prof. Code,
    § 17500 et seq.) (FAL), and the Consumers Legal Remedies Act
    (Civ. Code, § 1750 et seq.) (CLRA).
    These claims arose out of Noel’s purchase of an inflatable
    outdoor pool marketed as Kids Stuff Ready Set Pool 8FT X 25IN
    (hereinafter Ready Set Pool) from a Rite Aid drugstore in San
    Rafael.2 Noel alleges that his purchase of the pool was
    influenced by a photograph that appears on its packaging. This
    photo, as it appears within the complaint, indicates that the pool
    can handily accommodate several adults when inflated and
    filled:
    1
    James Noel died while this action was pending before the
    Court of Appeal and has been replaced as plaintiff by his widow,
    Diana Nieves Noel. To avoid confusion, our opinion refers to
    both as “Noel,” and uses the masculine pronoun whenever
    referring to plaintiff.
    2
    Defendant Thrifty Payless, Inc., operates the Rite Aid
    drugstore chain. Our opinion refers to defendant as “Rite Aid.”
    2
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    Noel asserts that when he set up the pool, he discovered that it
    was much smaller than the photograph on the box conveys. To
    demonstrate this, the complaint also includes another
    photograph of the pool, as inflated and filled:
    Noel’s claims under the UCL, the FAL, and the CLRA are
    premised on this alleged discrepancy.3
    In May 2014, Noel moved to certify a class defined as “[a]ll
    persons who purchased the Ready Set Pool at a Rite Aid store
    3
    Rite Aid responds that Noel did not set up the pool
    correctly.
    3
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    located in California within the four years preceding the date of
    the filing of this action.” By that time, Noel had conducted
    discovery that yielded the total number of Ready Set Pools that
    Rite Aid had sold in California during the class period (20,752,
    with 2,479 of the pools being returned), and the revenue
    obtained through these sales ($949,279.34). Noel’s discovery did
    not, however, delve into whether Rite Aid kept records of these
    transactions, or into the more general subjects of whether and
    how Rite Aid collected contact information from its customers
    and how it disseminated information to them.4
    In opposing class certification, Rite Aid argued that Noel
    had not demonstrated the existence of an ascertainable class —
    a well-established prerequisite for class certification under
    section 382 of the Code of Civil Procedure. (See, e.g., Brinker
    Restaurant Corp. v. Superior Court (2012) 
    53 Cal.4th 1004
    , 1021
    (Brinker); In re Tobacco II Cases (2009) 
    46 Cal.4th 298
    , 318 (In
    re Tobacco II); Sav-On Drug Stores, Inc. v. Superior Court (2004)
    
    34 Cal.4th 319
    , 326 (Sav-On); Linder v. Thrifty Oil Co. (2000) 
    23 Cal.4th 429
    , 435 (Linder); Richmond v. Dart Industries, Inc.
    (1981) 
    29 Cal.3d 462
    , 470 (Richmond); Vasquez v. Superior
    Court (1971) 
    4 Cal.3d 800
    , 809 (Vasquez); Daar v. Yellow Cab
    Co. (1967) 
    67 Cal.2d 695
    , 704 (Daar).) Specifically, Rite Aid
    asserted that to show an ascertainable class, Noel bore the
    burden of introducing evidence in connection with his
    certification motion that would show how members of the
    putative class could be identified later in the proceeding, so they
    4
    In his deposition, Noel testified that he had not retained
    the store receipt associated with his purchase of a Ready Set
    Pool, but had bought the pool using a debit card and possessed
    bank records containing an entry consistent with such a
    transaction.
    4
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    could be provided with notice of the pending action. In Rite Aid’s
    view, Noel’s failure to supply such proof doomed his certification
    effort.
    Noel responded that he had no obligation to offer evidence
    on this issue in order to secure certification of the class he
    proposed. His briefing in support of class certification described
    various ways in which notice of the action might be distributed
    to absent class members when the time came to do so.5 He
    explained that “modern day point of sale systems used by major
    retailers such as Rite Aid can already track purchases by
    customers who pay by credit card. Many of those customers
    likely belong to Rite Aid’s reward savings program, which
    means Rite Aid has contact information for these individuals.
    Thus, Rite Aid should be quite capable of sending individual
    notices to these purchasers.” Noel also claimed that Rite Aid
    “sends weekly e-mails to subscribers alerting them to new sales
    and deals” and mails out weekly advertisements to California
    customers, providing two other avenues through which notice
    could be provided to absent class members. However, Noel
    pointed to no evidence in the record (whether in the form of
    declarations, interrogatory responses or admissions by Rite Aid,
    deposition testimony, or information presented via a request for
    judicial notice) that substantiated his assertions regarding how
    class members could be notified. He did not, for example, supply
    the trial court with specific proof that, through a loyalty
    5
    Noel advanced certain methods of identifying class
    members to explain why, in his view, published notice (although
    possible) might be unnecessary. (See Civ. Code, § 1781, subd.
    (c)(2).)
    5
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    program, Rite Aid has access to pertinent customer contact
    information.
    The trial court denied the motion for class certification.
    The court’s order explained that “[w]hile the court might
    reasonably infer that the class, as defined by [p]laintiff, could be
    ascertained based on common business practices and record
    keeping, [p]laintiff has presented no evidence on this subject.
    Absent some evidence as to what method or methods will be
    utilized to identify the class members, what records are
    available, (either from [d]efendant, the manufacturer, or other
    entities such as banks or credit institutions), how those records
    would be obtained, what those records will show, and how
    burdensome their production would be, the court is without
    sufficient evidence to determine whether the proposed class is
    ascertainable. Accordingly, [the] motion to certify must be
    denied.”
    The trial court also declined to certify a class in connection
    with Noel’s CLRA claim for a second, separate reason. In the
    court’s view, common issues did not predominate with this claim
    because reliance had to be proved individually as to each class
    member. Finally, the court also found “that a class action is not
    superior to numerous individual actions, in light of the above
    findings. The class action will be no more efficient than
    individual actions in light of the individual issues that must be
    presented on the issue of reliance and damages.” The court’s
    order was not clear whether this last determination applied only
    to the CLRA class, as might be inferred by the reference to
    reliance, or to the action as a whole.
    After Noel appealed (see Linder, 
    supra,
     23 Cal.4th at
    p. 435 [denial of certification to an entire class is an appealable
    6
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    order]), the Court of Appeal found no abuse of discretion in the
    denial of class certification. (Noel v. Thrifty Payless, Inc. (2017)
    
    17 Cal.App.5th 1315
    , 1321 (Noel).) Addressing the superior
    court’s determination that Noel had not shown an ascertainable
    class, the reviewing court diagnosed “the underlying problem
    with the class certification motion” as “class counsel’s premature
    filing of the motion without first conducting sufficient discovery
    to meet its burden of demonstrating there are means of
    identifying members of the putative class so that they might be
    notified of the pendency of the litigation.” (Ibid.) The Court of
    Appeal emphasized that Noel had “submitted nothing offering a
    glimmer of insight into who purchased the pools or how one
    might find that out. He neither described nor produced Rite
    Aid’s records . . . nor did he indicate how much . . . information
    those records might reveal. Unless Noel could propose some
    realistic way of associating names and contact information with
    the 20,000-plus transactions identified by interrogatory
    response, there remained a serious due process question in
    certifying a class action.” (Id., at p. 1328.) The Court of Appeal
    continued, “While Noel was not required to actually identify the
    20,000-plus individuals who bought pools, his failure to come up
    with any means of identifying them was a legitimate basis for
    denying class certification.” (Ibid.)6
    6
    The Court of Appeal stressed that “the modest evidentiary
    burden” (Noel, supra, 17 Cal.App.5th at p. 1333) it would impose
    upon plaintiffs seeking class certification was “something that,
    with proper foresight in the early stages of a class proceeding,
    can be addressed quite easily, especially if it is given the same
    level of care and attention as, for example, drafting a precise
    description of the class” (id., at pp. 1333-1334).
    7
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    The Court of Appeal sought to harmonize its
    understanding of the ascertainability requirement with the
    views of other courts. The Court of Appeal noted that the court
    in Estrada v. FedEx Ground Package System, Inc. (2007) 
    154 Cal.App.4th 1
     (Estrada) had regarded a class as “ ‘ascertainable
    if it identifies a group of unnamed plaintiffs by describing a set
    of common characteristics sufficient to allow a member of that
    group to identify himself as having a right to recover based on
    the description.’ ” (Noel, supra, 17 Cal.App.5th at p. 1326,
    quoting Estrada, at p. 14, italics omitted.) The Court of Appeal
    also observed that Sotelo v. MediaNews Group, Inc. (2012) 
    207 Cal.App.4th 639
     (Sotelo) had prescribed a “more demanding
    standard” for ascertainability (Noel, at p. 1327), having
    explained, “ ‘The ascertainability requirement is a due process
    safeguard, ensuring that notice can be provided “to putative
    class members as to whom the judgment in the action will be res
    judicata.” [Citation.] “Class members are ‘ascertainable’ where
    they may be readily identified without unreasonable expense or
    time by reference to official records. [Citation.]” [Citation.] In
    determining whether a class is ascertainable, the trial court
    examines the class definition, the size of the class and the means
    of identifying class members.’ ” (Noel, at p. 1327, italics omitted,
    quoting Sotelo, at pp. 647-648.) Addressing these different
    formulations, the Court of Appeal in this case endorsed the
    Sotelo approach — describing it as “a more pragmatic approach
    in determining ascertainability, and one which comports with
    the rationale underlying the ascertainability requirement”
    (Noel, at p. 1327) — but also sought to reconcile these views by
    characterizing “Sotelo’s three-factor test as a refinement of the
    ascertainability prong of the Estrada test when that prong . . .
    requires a closer look.” (Noel, at p. 1329.)
    8
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    Although the appellate court below sought to reconcile the
    views of the Courts of Appeal, it recognized that some tension
    might exist between its analysis and that in Aguirre v. Amscan
    Holdings, Inc. (2015) 
    234 Cal.App.4th 1290
     (Aguirre). The
    Court of Appeal in Aguirre held that a superior court had erred
    when it declined to certify a putative consumer class on
    ascertainability grounds. (Id., at p. 1299.) The Aguirre court
    explained that a “representative plaintiff need not identify,
    much less locate, individual class members to establish the
    existence of an ascertainable class. [Citations.] Nor must the
    representative plaintiff establish a means for providing personal
    notice of the action to individual class members.” (Id., at p. 1301,
    italics added.) The Court of Appeal in this case sought to bridge
    the distance between its views and those expressed by the
    Aguirre court by noting that the class in Aguirre could have
    included up to a million members, whereas there were only
    approximately 20,000 purchasers of the Ready Set Pool. With
    the larger class, the Court of Appeal surmised, “perhaps
    assuming personal notice cannot be given was realistic, but with
    a class size of 20,000 we are not so quick to make that
    assumption.” (Noel, supra, 17 Cal.App.5th at p. 1331.) The
    Court of Appeal nevertheless conceded that its view of the
    ascertainability requirement “may be contrary to that of
    Aguirre.” (Id., at p. 1333.)
    The Court of Appeal also found no abuse of discretion in
    the superior court’s refusal to certify a CLRA class on the basis
    that common issues did not predominate. (Noel, supra, 17
    Cal.App.5th at pp. 1334-1336.) This aspect of the trial court’s
    order is not presently before us. Turning to the lower court’s
    determination that a class action was not a superior vehicle for
    pressing the claims at issue, the Court of Appeal noted the
    9
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    ambiguous scope of this ruling. (Id., at p. 1336.) The court also
    recognized Court of Appeal precedent holding that superiority is
    not required for a class action brought under the CLRA. (Noel,
    at p. 1336, citing Thompson v. Automobile Club of Southern
    California (2013) 
    217 Cal.App.4th 719
    , 727-728; see also Hogya
    v. Superior Court (1977) 
    75 Cal.App.3d 122
    , 132-136.)
    Nevertheless, the court found any error harmless: “If the court
    intended to include lack of superiority as a reason for rejecting
    class certification on the CLRA cause of action, that was error,
    but harmless due to the other valid reasons for denying class
    certification. If the court intended its negative superiority
    finding to apply only to the FAL and UCL causes of action, then
    it was supported by the evidence and did not amount to an abuse
    of discretion.” (Noel, at p. 1336.)
    We granted review to clarify what the ascertainability
    requirement for class certification involves.
    II. DISCUSSION
    In determining whether the trial court abused its
    discretion, we begin by surveying the relevant general principles
    applicable to class certification. We then turn to case law that
    has considered what it means for a class to be ascertainable.
    Drawing from this review, we conclude that the functions
    properly assigned to the ascertainability requirement are best
    served by regarding a class as ascertainable when it is defined
    “in terms of objective characteristics and common transactional
    facts” that make “the ultimate identification of class members
    possible when that identification becomes necessary.” (Hicks,
    supra, 89 Cal.App.4th at p. 915.) This standard was satisfied
    here because the class definition provided a basis for class
    members to self-identify. The courts below erred in importing
    10
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    an additional evidentiary burden into the ascertainability
    requirement.
    A. General Principles
    In reviewing a class certification order, our inquiry is
    “narrowly circumscribed.” (Brinker, 
    supra,
     53 Cal.4th at
    p. 1022.) “ ‘The decision to certify a class rests squarely within
    the discretion of the trial court, and we afford that decision great
    deference on appeal, reversing only for a manifest abuse of
    discretion: “Because trial courts are ideally situated to evaluate
    the efficiencies and practicalities of permitting group action,
    they are afforded great discretion in granting or denying
    certification.” [Citation.] A certification order generally will not
    be disturbed unless (1) it is unsupported by substantial
    evidence, (2) it rests on improper criteria, or (3) it rests on
    erroneous legal assumptions. ’ ” (Ibid.) “Under this standard,
    an order based upon improper criteria or incorrect assumptions
    calls for reversal ‘ “even though there may be substantial
    evidence to support the court’s order.” ’ ” (Linder, supra, 23
    Cal.4th at p. 436; see also Ayala v. Antelope Valley Newspapers,
    Inc. (2014) 
    59 Cal.4th 522
    , 537 [“[a] certification decision is
    reviewed for abuse of discretion, but when the supporting
    reasoning reveals the court based its decision on erroneous legal
    assumptions about the relevant questions, that decision cannot
    stand”].)
    Here, plaintiff sought certification of a class pursuant to
    section 382 of the Code of Civil Procedure, which provides a
    general authorization for class actions, and section 1781 of the
    Civil Code, the provisions of which govern class suits brought
    under the CLRA and inform class action practice more
    11
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    generally. (See Linder, 
    supra,
     23 Cal.4th at p. 437; Vasquez,
    supra, 4 Cal.3d at p. 820.)
    Section 382 of the Code of Civil Procedure authorizes a
    class action when “the question is one of a common or general
    interest, of many persons, or when the parties are numerous,
    and it is impracticable to bring them all before the court.” “[W]e
    have articulated clear requirements for the certification of a
    class” under this statute. (Brinker, supra, 53 Cal.4th at p. 1021.)
    “The party advocating class treatment must demonstrate the
    existence of an ascertainable and sufficiently numerous class, a
    well-defined community of interest, and substantial benefits
    from certification that render proceeding as a class superior to
    the alternatives.”     (Ibid.)     “The community of interest
    requirement involves three factors: ‘(1) predominant common
    questions of law or fact; (2) class representatives with claims or
    defenses typical of the class; and (3) class representatives who
    can adequately represent the class.’ ” (Linder, supra, 23 Cal.4th
    at p. 435.) Regarding the first of these factors, we have
    recognized “ ‘[a]s a general rule’ ” that “ ‘if the defendant’s
    liability can be determined by facts common to all members of
    the class, a class will be certified even if the members must
    individually prove their damages.’ ” (Brinker, at p. 1022; see
    also Daar, supra, 67 Cal.2d at p. 706.) Relatedly, “In certifying
    a class action, the court must also conclude that litigation of
    individual issues, including those arising from affirmative
    defenses, can be managed fairly and efficiently.” (Duran v. U.S.
    Bank National Assn. (2014) 
    59 Cal.4th 1
    , 28-29.) Finally, other
    considerations relevant to certification “include the probability
    that each class member will come forward ultimately to prove
    his or her separate claim to a portion of the total recovery and
    12
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    whether the class approach would actually serve to deter and
    redress alleged wrongdoing.” (Linder, at p. 435.)
    The CLRA includes its own set of requirements for class
    certification. Under this statute, “The court shall permit [a
    class] suit to be maintained on behalf of all members of the
    represented class if all of the following conditions exist: (1) It is
    impracticable to bring all members of the class before the court.
    [¶] (2) The questions of law or fact common to the class are
    substantially similar and predominate over the questions
    affecting the individual members. [¶] (3) The claims or defenses
    of the representative plaintiffs are typical of the claims or
    defenses of the class. [¶] (4) The representative plaintiffs will
    fairly and adequately protect the interests of the class.” (Civ.
    Code, § 1781, subd. (b).) We have not specifically identified
    ascertainability as an essential element for class certification
    under the CLRA, as we have for class actions authorized by
    section 382 of the Code of Civil Procedure. Yet the Courts of
    Appeal have routinely demanded that CLRA plaintiffs
    demonstrate the existence of an ascertainable class (see, e.g.,
    Apple Inc. v. Superior Court (2018) 
    19 Cal.App.5th 1101
    , 1116,
    fn. 2; In re Vioxx Class Cases (2009) 
    180 Cal.App.4th 116
    , 128,
    fn. 12), and this requirement is fairly subsumed in the need to
    have a coherent “represented class” to pursue a class action
    under the statute (Civ. Code, §1781, subd. (b)).
    B. Past Discussions of Ascertainability
    Although our case law has been clear that a plaintiff must
    show an ascertainable class as a prerequisite to class
    certification, neither our decisions nor those of the Courts of
    Appeal have been as pellucid in explaining what this
    requirement entails.
    13
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    1. Weaver
    Our first discussion of class ascertainability appeared
    more than 70 years ago — a time when class action litigation
    remained in a formative stage. (See Miller, The Preservation
    and Rejuvenation of Aggregate Litigation: A Systemic
    Imperative (2014) 
    64 Emory L.J. 293
    , 294.) In this milieu, the
    four plaintiffs in Weaver v. Pasadena Tournament of Roses
    (1948) 
    32 Cal.2d 833
     (Weaver) brought a lawsuit to recover
    statutory penalties for an allegedly wrongful refusal to admit
    them to the 1947 Rose Bowl football game. (Id., at p. 835.) The
    plaintiffs sought to pursue the matter as a representative suit
    on behalf of themselves and hundreds of other would-be patrons
    who also had waited in line for tickets that ended up being
    allocated through assertedly improper private sales. (Id., at p.
    836.)
    We agreed with the superior court’s determination that
    the suit was not an appropriate representative action. (Weaver,
    supra, 32 Cal.2d at p. 835.) We stressed, “In the present case
    there is no ascertainable class, such as the stockholders,
    bondholders, or creditors of an organization. Rather, there is
    only a large number of individuals, each of whom may or may
    not have, or care to assert, a claim against the operators of the
    1947 Rose Bowl Game for the alleged wrongful refusal of
    admission thereto. Each of such claimants must establish
    separately that he was refused admission, and that such refusal
    was wrongful . . . . While each would be ‘similarly situated’ in
    that his cause of action arises under the same statute, his
    recovery would rest on a distinct premise correlative with
    varying proof as to the facts of his particular case. In such
    circumstances there is not the necessary ‘common or general
    interest’ in the subject-matter of the litigation appropriate to the
    14
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    maintenance of a representative action as that type of
    proceeding has been analyzed in the adjudicated cases.” (Id., at
    pp. 839-840.)
    Our opinion in Weaver, supra, 
    32 Cal.2d 833
    , also noted
    “one further point” that provided additional support for the trial
    court’s ruling. (Id., at p. 842.) We observed, “In cases properly
    falling within the category of representative litigation, the
    judgment or decree would be res judicata for or against the class
    sought to be represented. [Citations.] But that result could not
    be extended to entirely separate causes of action, such as the
    four plaintiffs have pleaded here, so as to bind ‘several hundred
    individuals’ who are not named, and who are, so far as the
    complaint shows, unknown and unascertainable. Rather, these
    unknown parties are ascertainable only insofar as each may
    come forward and individually present proof of all the facts
    necessary to authorize a recovery in accordance with the merits
    of his particular case, and judgment in one would by no means
    be a judgment in any other. Plaintiffs here do not claim to
    represent an association or protective committee nor do they
    present any reasonable basis for ascertaining the members of
    the alleged class for whom they seek to act in this litigation.
    [Citation.] In short, plaintiffs’ complaint can be regarded as no
    more than an invitation to such persons as may be interested to
    join with them in this action in seeking relief ‘arising out of the
    same transaction or series of transactions’ [citation], but such
    situation furnishes no ground for the maintenance of a
    representative proceeding. . . .” (Id., at pp. 842-843.)
    2. Chance
    We next discussed ascertainability in the context of a
    representative proceeding in Chance v. Superior Court (1962)
    15
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    
    58 Cal.2d 275
     (Chance). The plaintiffs in Chance sued on behalf
    of themselves and all other owners of promissory notes secured
    by 2,139 trust deeds on specific parcels within a tract of land.
    (Id., at pp. 278-279.) The plaintiffs alleged that they and other
    members of the putative class had been ensnared in a scheme in
    which each deed of trust was associated with only a miniscule
    parcel. (Id., at p. 280.) The plaintiffs sought a collective
    foreclosure, the proceeds of which would help mitigate their
    investment losses. (Id., at p. 283.)
    In concluding that this suit could be brought as a
    representative action, we first addressed whether the requisite
    community of interest existed among class members. We
    concluded that it did. (Chance, supra, 58 Cal.2d at pp. 284-286.)
    Only later did we discuss ascertainability. Our analysis
    provided, “[A]ll of the members of the instant class are
    ascertainable (compare with Weaver v. Pasadena Tournament of
    Roses Assn, supra, 
    32 Cal.2d 833
    , 839-840, 843), and it is
    assumed that they will be given notice of the pending class
    foreclosure action by registered mail or other like reliable
    method [citation], thereby being afforded an opportunity to
    decide whether to appear and argue for any and all appropriate
    or available forms of redress desirable from their individual
    points of view, against the named defendants.” (Id., at p. 290.)
    3. Daar
    Our most extensive discussion of class ascertainability
    appeared five years after Chance, in Daar, supra, 
    67 Cal.2d 695
    .
    The plaintiff in Daar sued the Yellow Cab Company for allegedly
    overcharging him and other taxi customers. (Id., at pp. 699-
    700.) He sought certification of both a subclass of customers who
    had paid for taxi services with script book coupons, and another
    16
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    subclass of customers who had paid with cash. Regarding the
    first of these subclasses, plaintiff alleged “that the names and
    addresses of all purchasers and users of script books can be
    definitely ascertained from defendant’s books and records.” (Id.,
    at p. 700.) No similar assertions relevant to identification
    appeared in the class allegations pertaining to cash customers,
    as related in a separate count. (Id., at p. 702.)
    The defendant in Daar had successfully demurred to the
    complaint. (Daar, supra, 67 Cal.2d at p. 698.) We reversed,
    holding that the allegations in each count stated facts sufficient
    for class treatment under section 382 of the Code of Civil
    Procedure. (Daar, at pp. 714, 717.) In relating the background
    legal principles that guided our analysis, we explained that “it
    uniformly has been held that two requirements must be met in
    order to sustain any class action: (1) there must be an
    ascertainable class [citations]; and (2) there must be a well
    defined community of interest in the questions of law and fact
    involved affecting the parties to be represented.” (Id., at p. 704.)
    In describing the first of these requirements, we cited to our
    decisions in Weaver, supra, 
    32 Cal.2d 833
    , and Chance, supra,
    
    58 Cal.2d 275
    , and further explained that “[a]pplicable
    precedents indicate that in observing the ascertainable class
    requirement they are at the same time giving recognition to the
    principle that a group of individuals’ rights to recover, each of
    which is based on a separate set of facts, cannot be determined
    by a judgment in a class action. To put it in another way,
    although a judgment in a class action is res judicata as to claims
    of members of the class represented therein [citations], res
    judicata will not preclude subsequent actions by those whose
    rights to recover are based upon different facts. Therefore, such
    17
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    individuals cannot properly be brought under the umbrella of a
    class action.” (Daar, at pp. 704-705.)
    As in Weaver, the description of ascertainability in Daar,
    supra, 
    67 Cal.2d 695
     did not consistently distinguish this
    prerequisite for class certification from the need to establish a
    community of interest among the class. Portions of our opinion
    in Daar instead cast these elements as intertwined, such as our
    explanation at one juncture that “whether there is an
    ascertainable class depends in turn upon the community of
    interest among the class members in the questions of law and
    fact involved.” (Id., at p. 706.)
    Daar, supra, 
    67 Cal.2d 695
     did clarify certain aspects of
    the ascertainability inquiry, however. We explained in Daar
    that the requirement that a plaintiff show an ascertainable class
    does not subsume a “necessity of identifying the individual
    members of such class as a prerequisite to a class suit. If the
    existence of an ascertainable class has been shown, there is no
    need to identify its individual members in order to bind all
    members by the judgment. The fact that the class members are
    unidentifiable at this point will not preclude a complete
    determination of the issues affecting the class.” (Id., at p. 706.)
    In the Daar matter itself, “Presumably an accounting in the suit
    at bench will determine the total amount of the alleged
    overcharges; any judgment will be binding on all the users of
    taxicabs within the prior four years. However, no one may
    18
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    recover his separate damages until he comes forward, identifies
    himself and proves the amount thereof.” (Ibid.)7
    4. Subsequent decisions of this court
    Daar, supra, 
    67 Cal.2d 695
     remains our most detailed
    explication of the ascertainability requirement. In the half-
    century since Daar, we have frequently mentioned the need to
    show an ascertainable class as a prerequisite to certification.
    (E.g., Brinker, 
    supra,
     53 Cal.4th at p. 1021; In re Tobacco II,
    
    supra,
     46 Cal.4th at p. 318; Sav-On, 
    supra,
     34 Cal.4th at p. 326;
    Linder, 
    supra,
     23 Cal.4th at p. 435; Richmond, supra, 29 Cal.3d
    at p. 470; Vasquez, supra, 4 Cal.3d at p. 809.) In some instances,
    we have explained how the class before us satisfied this
    requirement. (E.g., Richmond, at p. 478 [observing that the
    members of the class “are easily identified and located”];
    Vasquez, at p. 811 [noting that the names and addresses of the
    approximately 200 persons in the proposed class “may be
    ascertained from defendants’ books”]; Occidental Land, Inc. v.
    Superior Court (1976) 
    18 Cal.3d 355
    , 360 [“class members can
    be readily identified by a search of public records”].) On two
    other occasions, we have referenced ascertainability in finding
    no abuse of discretion in trial courts’ refusals to certify proposed
    7
    Our opinion in Daar, supra, 
    67 Cal.2d 695
     also quoted a
    leading treatise’s observation that “ ‘[a] distinction is sometimes
    drawn between the maintenance of the suit and its binding
    effect on the absent parties. A sufficient pleading of the
    conditions may withstand a demurrer and satisfy the court that
    the action should proceed. But if the judgment is thereafter
    collaterally attacked by an absent party, a more careful scrutiny
    of its representative character may be made in determining
    whether it is res judicata.’ ” (Id., at p. 706, quoting 2 Witkin,
    Cal. Procedure (1954) Representative or Class Suits, § 99,
    p. 1080.)
    19
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    classes. In both of these cases, however, there were multiple
    grounds for denying class certification, which meant that our
    analysis did not squarely address whether the failed class was
    or was not ascertainable. (Fletcher v. Security Pacific National
    Bank (1979) 
    23 Cal.3d 442
    , 448-449; Gerhard v. Stephens (1968)
    
    68 Cal.2d 864
    , 912-913.)
    We have only twice offered additional explanations of
    what it means for a class to be ascertainable. Both of these
    descriptions were of a summary nature. In Vasquez, supra,
    
    4 Cal.3d 800
    , we stated that “[a]s to the necessity for an
    ascertainable class, the right of each individual to recover may
    not be based on a separate set of facts applicable only to him.”
    (Id., at p. 809.) More recently, the majority opinion in In re
    Tobacco II, 
    supra,
     
    46 Cal.4th 298
     characterized ascertainability
    as a “preliminary step” to class certification, which requires that
    a class “ ‘ “be sufficiently definite so that it is administratively
    feasible for the Court to determine whether a particular
    individual is a member of the proposed class.” ’ ” (Id., at p. 323,
    quoting Miller v. Janssen Pharmaceutica Products, L.P. (S.D.Ill.
    2007) 
    2007 WL 1295824
    , p. *5.) Class ascertainability was not
    an issue before us in In re Tobacco II, however, and we had no
    occasion in that case to exhaustively consider how the concept
    should be understood.
    To summarize, our case law has recognized an
    ascertainability requirement for class actions, but we have not
    clearly articulated what this requirement entails or how it is
    distinct from other prerequisites for certification — especially
    the need to show a community of interest among class members.
    Our decisions have also abstractly tethered class
    ascertainability to due process considerations that include, but
    are not necessarily limited to, the need to provide absent class
    20
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    members with adequate notice. But this connection has not led
    to a consensus among the Courts of Appeal regarding what the
    ascertainability requirement entails.
    5. The views of the Courts of Appeal regarding
    ascertainability
    Following our decision in Daar, supra, 
    67 Cal.2d 695
    , the
    Courts of Appeal have developed two basic views of the
    ascertainability requirement.
    One view of ascertainability concentrates on the proposed
    class definition itself. This view was applied in Bartold v.
    Glendale Federal Bank (2000) 
    81 Cal.App.4th 816
     (Bartold),
    superseded by statute on another point as stated in Markowitz
    v. Fidelity Nat. Title Co. (2006) 
    142 Cal.App.4th 508
    , 524. The
    Bartold court explained that “[a] class is ascertainable if it
    identifies a group of unnamed plaintiffs by describing a set of
    common characteristics sufficient to allow a member of that
    group to identify himself or herself as having a right to recover
    based on the description.” (81 Cal.App.4th at p. 828.) This basic
    view of ascertainability has been reiterated by numerous other
    Courts of Appeal, including the courts in Estrada, supra, 154
    Cal.App.4th at page 14 and Aguirre, supra, 234 Cal.App.4th at
    pages 1299 to 1300. (See also Aguirre, at p. 1300 [listing cases].)
    A similar formulation regards a class as ascertainable when it
    is defined “in terms of objective characteristics and common
    transactional facts” that make “the ultimate identification of
    class members possible when that identification becomes
    necessary.” (Hicks, supra, 89 Cal.App.4th at p. 915.)
    The second basic view of ascertainability entails a more
    exacting inquiry.       One such articulation regards the
    ascertainability requirement as calling for an examination into
    “(1) the class definition, (2) the size of the class and (3) the
    21
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    means of identifying class members.” (Miller v. Woods (1983)
    
    148 Cal.App.3d 862
    , 873 (Miller); see also Noel, supra, 17
    Cal.App.5th at p. 1324, Sotelo, supra, 207 Cal.App.4th at p. 648;
    Reyes v. Board of Supervisors (1987) 
    196 Cal.App.3d 1263
    ,
    1274.) Consistent with this view, it has been said that “[c]lass
    members are ‘ascertainable’ where they may be readily
    identified without unreasonable expense or time by reference to
    official records.” (Rose v. City of Hayward (1981) 
    126 Cal.App.3d 926
    , 932 (Rose).) On its face, the quoted language from Rose
    could be understood as specifying a sufficient, as opposed to a
    necessary, basis for finding an ascertainable class within the
    Miller framework.8 But some courts, drawing from Rose’s focus
    on the mechanics of identifying class members, have gone
    further and required a class plaintiff to make a specific factual
    or evidentiary showing in order to show an ascertainable class.
    The Court of Appeal below, for example, regarded plaintiff as
    obligated to provide proof substantiating a specific mechanism
    or mechanisms through which class members could be identified
    8
    The court in Rose, supra, 
    126 Cal.App.3d 926
    , ultimately
    determined that “[t]he identity of the class . . . is readily
    ascertainable from . . . departmental records” — a conclusion
    that did not necessarily rule out other avenues for showing an
    ascertainable class. (Id., at p. 932; see also Faulkinbury v. Boyd
    & Associates, Inc. (2013) 
    216 Cal.App.4th 220
    , 240 [applying the
    Rose standard and finding an ascertainable class]; Mora v. Big
    Lots Stores, Inc. (2011) 
    194 Cal.App.4th 496
    , 504 [same];
    Bomersheim v. Los Angeles Gay & Lesbian Center (2010) 
    184 Cal.App.4th 1471
    , 1481 [same]; Ghazaryan v. Diva Limousine,
    Ltd. (2008) 
    169 Cal.App.4th 1524
    , 1532-1533 [same]; Lee v.
    Dynamex, Inc. (2008) 
    166 Cal.App.4th 1325
    , 1334 [same]; Bufil
    v. Dollar Financial Group, Inc. (2008) 
    162 Cal.App.4th 1193
    ,
    1206-1208 [same]; Aguiar v. Cintas Corp. No. 2 (2006) 
    144 Cal.App.4th 121
    , 135-136 [same].)
    22
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    so as to be personally notified of the class proceeding. (Noel,
    supra, 17 Cal.App.5th at pp. 1329, 1333.) The absence of
    “official” records identifying class members was central to the
    analysis in Sotelo, supra, 
    207 Cal.App.4th 639
    , in which the
    Court of Appeal affirmed a denial of class certification due to the
    representative plaintiffs’ perceived failure to show an
    ascertainable class. (Id., at p. 650.) Other Courts of Appeal, in
    affirming denials of class certification on ascertainability
    grounds, have emphasized that the representative plaintiff or
    plaintiffs had not shown that individual class members could be
    readily identified without unreasonable expense or time. (E.g.,
    Cruz v. Sun World Internat., LLC (2015) 
    243 Cal.App.4th 367
    ,
    382; Hale v. Sharp Healthcare (2014) 
    232 Cal.App.4th 50
    , 59-
    61.)
    The differences between these two basic approaches to
    ascertainability can be somewhat blurred in practice. And as
    previously noted, the Court of Appeal below attempted to
    synthesize these views.        (Noel, supra, 17 Cal.App.5th at
    p. 1329.) But as this case illustrates, a court’s choice between
    the two views can be critical. A construction of ascertainability
    that assigns the plaintiff in a putative class action an
    affirmative responsibility to show the existence of records (or
    some other mechanism or channel) through which individual
    class members can be identified for the purpose of providing
    them with personal notice of the proceeding may function to
    defeat class certification in a variety of situations. A plaintiff
    may not anticipate the need to adduce such proof at the time
    class certification is sought, meaning that no precertification
    discovery will have occurred on this point. This kind of
    evidentiary requirement also can prevent certification when a
    23
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    plaintiff’s discovery efforts, albeit substantial, produce
    inadequate evidence from the perspective of the court.
    An additional burden emerges when the plaintiff must
    demonstrate that individual members of the proposed class can
    “be readily identified without unreasonable expense or time.”
    (Rose, supra, 126 Cal.App.3d at p. 932.)        With such a
    requirement, class certification may be denied on
    ascertainability grounds due to expected complexities in the
    provision of notice, or in distinguishing class members from
    nonmembers — without close consideration necessarily being
    given to whether these difficulties are actual, as opposed to
    merely hypothetical, or whether they are so intransigent and
    pervasive that they would make a class proceeding
    unmanageable, or undesirable in light of the plausible
    alternatives.
    6. The views of the federal courts regarding
    ascertainability
    Federal courts have wrestled with ascertainability issues
    in cases where plaintiffs have sought certification of a class under
    rule 23 of the Federal Rules of Civil Procedure (28 U.S.C.).9
    Although this rule does not expressly demand an ascertainable
    class, most courts tasked with applying it have regarded
    ascertainability as an implicit “ ‘threshold’ ” requirement for
    certification of a class under Rule 23(b)(3). (Sandusky Wellness
    Center v. MedTox Scientific (8th Cir. 2016) 
    821 F.3d 992
    , 995; but
    see Briseno v. ConAgra Foods, Inc. (9th Cir. 2017) 
    844 F.3d 1121
    ,
    1124-1125, fn. 4 [“we have addressed the types of alleged
    definitional deficiencies other courts have referred to as
    9
    All further references to “Rule 23” and its subparts are to
    the Federal Rules of Civil Procedure (28 U.S.C.).
    24
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    ‘ascertainability’ issues . . . through analysis of Rule 23’s
    enumerated requirements”].) In this context, competing views
    regarding ascertainability have emerged within the federal
    system, just as they have within the courts of this state.
    A stringent view of ascertainability is most closely
    associated with decisions produced by the United States Court
    of Appeals for the Third Circuit. (See Marcus v. BMW of North
    America, LLC (3d Cir. 2012) 
    687 F.3d 583
    , 592-594 (Marcus);
    Hayes v. Wal-Mart Stores, Inc. (3d Cir. 2013) 
    725 F.3d 349
    , 354-
    356; Carrera v. Bayer Corp. (3d Cir. 2013) 
    727 F.3d 300
    , 305-
    312.) Under this approach, a plaintiff seeking class certification
    under Rule 23(b)(3) must show not only that the class has been
    “defined with reference to objective criteria,” but also that there
    is “a reliable and administratively feasible mechanism for
    determining whether putative class members fall within the
    class definition.” (Hayes, at p. 355.) Courts adopting this
    conception of ascertainability have refused to certify (or upheld
    refusals to certify) consumer classes in situations such as the
    one presently before this court — in which it is unlikely, or at
    least unproven, that individual purchasers of the commodity at
    the heart of the dispute would have retained their receipts or
    other proof of purchase, the defendant did not maintain a
    specific list of purchasers, and the putative class representative
    offered no proof when seeking certification “that a single
    purchaser of [the product] could be identified using records of
    customer membership cards or records of online sales.”
    (Carrera, at p. 309; see id., at pp. 304, 312.)
    Other courts have pushed back on this stringent approach
    to ascertainability. The United States Court of Appeals for the
    Seventh Circuit is among the federal courts that assign a
    narrower function to the ascertainability requirement. Its
    25
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    decision in Mullins v. Direct Digital, LLC (7th Cir. 2015) 
    795 F.3d 654
     (Mullins) offers a thorough, and in our view
    illuminating, assessment of how ascertainability should be
    understood in connection with class certification. Because the
    analysis in Mullins is particularly helpful in resolving the issue
    before us, we discuss its facts and reasoning at some length
    below. (See Linder, 
    supra,
     23 Cal.4th at pp. 437-439 [consulting
    federal court decisions construing Rule 23 for guidance in
    dealing with similar class certification issues arising under
    state law].)
    The plaintiff in Mullins, supra, 
    795 F.3d 654
    , secured the
    certification of a consumer class under Rule 23(b)(3) in a matter
    alleging that the defendant made fraudulent representations in
    marketing a dietary joint supplement. (Mullins, at p. 658.)
    Drawing from the Third Circuit’s jurisprudence, the defendant
    in Mullins argued on appeal of the certification order that the
    class was not ascertainable because the plaintiff had “fail[ed] to
    show a reliable and administratively feasible way to determine
    whether a particular person is a member of the class.” (Id., at
    p. 661.)
    The appellate court in Mullins, supra, 
    795 F.3d 654
    ,
    rejected this view of ascertainability and affirmed the class
    certification order entered by the district court. (Id., at p. 658.)
    In doing so, the federal court of appeals distinguished between
    a     relatively    uncontroversial     “ ‘weak’     version      of
    ascertainability,” and the more demanding ascertainability
    standard adopted by the Third Circuit. (Id., at p. 659.) The
    “ ‘weak’ ” construction of ascertainability, the court explained,
    derives from “experience [that] has led courts to require that
    classes be defined clearly and based on objective criteria.” (Ibid.)
    Even in this weak form, Mullins elaborated, the requirement of
    26
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    a clearly defined class based on objective criteria is far from
    toothless, for it serves to weed out “classes that are defined too
    vaguely” (ibid.), “classes that are defined by subjective criteria,
    such as by a person’s state of mind” (id., at p. 660), and “classes
    that are defined in terms of success on the merits — so-called
    ‘fail-safe classes’ ” (ibid.), all of which raise due process or other
    fairness concerns. The Mullins court regarded this approach to
    ascertainability as striking an appropriate balance, whereas the
    Third Circuit’s more exacting conception of this requirement did
    not. In the view of the Mullins court, the more demanding
    specification “does not further any interest of Rule 23 that is not
    already adequately protected by the Rule’s explicit
    requirements. On the other side of the balance, the costs of
    imposing the requirement are substantial. The stringent
    version of ascertainability effectively bars low-value consumer
    class actions, at least where plaintiffs do not have documentary
    proof of purchases, and sometimes even when they do.” (Id., at
    p. 662.)
    Mullins, supra, 
    795 F.3d 654
     then proceeded to dissect the
    specific policy arguments advanced for the Third Circuit’s
    construction of the ascertainability requirement. (Id., at pp.
    663-672.) One such contention was that the “stringent version
    of ascertainability ‘eliminates serious administrative burdens
    that are incongruous with the efficiencies expected in a class
    action by insisting on the easy identification of class members.’ ”
    (Id., at p. 663, quoting Marcus, supra, 687 F.3d at p. 593.) The
    Mullins court saw this concern as “better addressed by the
    explicit requirements of Rule 23(b)(3), which requires that the
    class device be ‘superior to other available methods for fairly and
    efficiently adjudicating the controversy,’ ” with one
    consideration relevant to the superiority inquiry being “ ‘the
    27
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    likely difficulties in managing a class action.’ ”            (Mullins,
    quoting Rule 23(b)(3), (b)(3)(D).)
    Mullins, supra, 
    795 F.3d 654
     explained why it made more
    sense to address within the context of manageability any
    concerns about the burdens that could be associated with the
    identification of class members: “When administrative
    inconvenience is addressed as a matter of ascertainability,
    courts tend to look at the problem in a vacuum, considering only
    the administrative costs and headaches of proceeding as a class
    action. [Citation.] But when courts approach the issue as part
    of a careful application of Rule 23(b)(3)’s superiority standard,
    they must recognize both the costs and benefits of the class
    device. [Citation.] [¶] . . . In many cases where the heightened
    ascertainability requirement will be hardest to satisfy, there
    realistically is no other alternative to class treatment.” (Id., at
    pp. 663-664.) The court in Mullins cautioned that “[t]his does
    not mean . . . that district courts should automatically certify
    classes in these difficult cases,” and granted that “[i]f faced with
    what appear to be unusually difficult manageability problems
    at the certification stage, district courts have discretion to insist
    on details of the plaintiff’s plan for notifying the class and
    managing the action.” (Id., at p. 664.) Yet, the court continued,
    judges who encounter such challenges should attempt to
    leverage their “experience with and flexibility in engineering
    solutions to difficult problems of case management,” and
    “refusing to certify on manageability grounds alone should be
    the last resort.” (Ibid.)
    The court in Mullins, supra, 
    795 F.3d 654
     also addressed
    an argument that resonated with the Court of Appeal in this
    case — “that the heightened ascertainability requirement is
    needed to protect absent class members. If the identities of
    28
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    absent class members cannot be ascertained, the argument
    goes, it is unfair to bind them by the judicial proceeding.” (Id., at
    p. 665.) It perceived that “[a] central premise of this argument
    is that class members must receive actual notice of the class
    action so that they do not lose their opt-out rights.” (Ibid.)
    The court in Mullins, supra, 
    795 F.3d 654
     regarded this
    premise as mistaken. It emphasized that, when a class has been
    certified under Rule 23(b)(3), Rule 23(c)(2)(B) requires the
    provision of the “ ‘best notice that is practicable under the
    circumstances, including individual notice to all members who
    can be identified through reasonable effort’ ” — language
    connoting that individual notice need not be given to members
    who cannot be so identified. (Mullins, at p. 665.)10 Nor, in the
    court’s view, did principles of due process invariably require
    individual notice to absent class members. Instead, in cases
    such as the one before it, “When class members’ names and
    addresses are known or knowable with reasonable effort, notice
    can be accomplished by first-class mail. [Citation.] When that
    is not possible, courts may use alternative means such as notice
    through third parties, paid advertising, and/or posting in places
    10
    With classes certified under Rule 23(b)(1) or (2),
    meanwhile, the federal rules provide more generally that “the
    court may direct appropriate notice to the class.” (Id., Rule
    23(c)(2)(A).)
    29
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    frequented by class members, all without offending due
    process.” (Ibid.)11
    Mullins, supra, 
    795 F.3d 654
     also explained why
    construing the ascertainability requirement as anticipating
    personal notice in all cases could provide absent class members
    with a pyrrhic victory. “More broadly,” the court wrote, “the
    stringent version of ascertainability loses sight of a critical
    feature of class actions for low-value claims like this one. In
    these cases, ‘only a lunatic or a fanatic’ would litigate the claim
    individually, [citation], so opt-out rights are not likely to be
    exercised by anyone planning a separate individual lawsuit.
    When this is true, it is particularly important that the types of
    notice that courts require correspond to the value of the absent
    class members’ interests. [Citation.] . . . . [¶] The heightened
    ascertainability approach upsets this balance. It comes close to
    insisting on actual notice to protect the interests of absent class
    members, yet overlooks the reality that without certification,
    putative class members with valid claims would not recover
    anything at all.” (Id., at pp. 665-666.)
    11
    Mullins, supra, 
    795 F.3d 654
     also rejected the argument
    that a heightened ascertainability requirement was necessary
    to protect the due process interests of class action defendants by
    protecting them from bogus claims and disproportionate
    liability. (Id., at pp. 669-672.) These concerns do not resonate
    here, in any event. There is no suggestion that, if the plaintiff
    class ultimately prevails, Rite Aid will face any onslaught of
    spurious claims, much less a bevy that could not be weeded out
    through a competent claims administration process. Also,
    because it is known how many pools were sold and not returned,
    and how much in revenue Rite Aid earned from these sales, the
    overall body of claims has a functional ceiling that further
    marginalizes any prospect of exaggerated liability.
    30
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    C.    Analysis
    1. An ascertainable class is one defined in objective
    terms that make the eventual identification of class
    members possible
    Although Mullins, supra, 
    795 F.3d 654
     applied only
    federal law, much of its analysis rings true here as well. We
    agree with Mullins’ assignment of a limited but important
    function to the ascertainability requirement. We conclude that
    the objectives of this requirement are best achieved by regarding
    a class as ascertainable when it is defined “in terms of objective
    characteristics and common transactional facts” that make “the
    ultimate identification of class members possible when that
    identification becomes necessary.”           (Hicks, supra, 89
    Cal.App.4th at p. 915.) We regard this standard as including
    class definitions that are “sufficient to allow a member of [the
    class] to identify himself or herself as having a right to recover
    based on the [class] description.”          (Bartold, supra, 81
    Cal.App.4th at p. 828.)
    This understanding of the threshold requirement of
    ascertainability for class certification protects the due process
    interests of all parties and absent class members without
    unduly impairing the efficacy of the class action mechanism. We
    have explained some of the benefits that class proceedings such
    as the one at bar can yield: “Not only do class actions offer
    consumers a means of recovery for modest individual damages,
    but such actions often produce ‘several salutary by-products,
    including a therapeutic effect upon those sellers who indulge in
    fraudulent practices, aid to legitimate business enterprises by
    curtailing illegitimate competition, and avoidance to the judicial
    process of the burden of multiple litigation involving identical
    31
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    claims.’ ” (Linder, 
    supra,
     23 Cal.4th at p. 445, quoting Vasquez,
    supra, 4 Cal.3d at p. 808; see also Vasquez, at p. 807.)
    But a class proceeding must be maintained in a manner
    consistent with due process. A class definition framed in
    objective terms that make the identification of class members
    possible promotes due process in at least two ways. Such
    phrasing puts members of the class on notice that their rights
    may be adjudicated in the proceeding, so they must decide
    whether to intervene, opt out, or do nothing and live with the
    consequences. (See Hicks, supra, 89 Cal.App.4th at p. 914
    [“[a]scertainability is required in order to give notice to putative
    class members as to whom the judgment in the action will be res
    judicata”].) This kind of class definition also advances due
    process by supplying a concrete basis for determining who will
    and will not be bound by (or benefit from) any judgment.
    Allowing a class to be defined in vague terms, by contrast, could
    blunt any invocation of res judicata by the defendant in
    subsequent lawsuits brought by persons attempting to relitigate
    issues decided in the earlier class proceeding. The outcome
    might resemble that which obtains when the “one-way
    intervention” condemned by our decision in Fireside Bank v.
    Superior Court (2007) 
    40 Cal.4th 1069
    , 1078 (Fireside Bank)
    occurs — the defendant could be unfairly exposed to a succession
    of essentially duplicative class lawsuits (see 
    id.,
     at pp. 1078-
    1083).12
    12
    The ascertainability standard we endorse also addresses
    similar fairness concerns that may be associated with other
    problematic class definitions, such as a class defined by its
    putative members’ subjective states of mind, as opposed to
    32
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    The Court of Appeal saw a slightly different set of due
    process considerations as favoring a more stringent approach to
    ascertainability.     It expressed concern that, without an
    evidentiary showing by plaintiff, absent class members would
    never receive notice of the action and would therefore lack the
    opportunity to opt out. To this effect, the Court of Appeal quoted
    Sotelo, supra, 207 Cal.App.4th at page 649: “ ‘The theoretical
    ability to self-identify as a member of the class is useless if one
    never receives notice of the action.’ ”         (Noel, supra, 17
    Cal.App.5th at p. 1327.) We appreciate the court’s interest in
    protecting the due process rights of absent class members. Yet,
    as we explain below, this concern does not justify the evidentiary
    burden that the Court of Appeal attached to the ascertainability
    requirement — or, for that matter, any blanket requirement
    that class members must be identifiable “by reference to official
    records” (Rose, supra, 126 Cal.App.3d at p. 932) to form an
    ascertainable class.
    We agree, of course, that the provision of notice to absent
    class members carries due process connotations. (See Phillips
    Petroleum Co. v. Shutts (1985) 472 U.S 797, 811 (Shutts);
    Fireside Bank, 
    supra,
     40 Cal.4th at p. 1083.) But due process
    does not dictate that certification of a putative plaintiff class
    invariably must depend on all absent class members being sent
    (much less receiving) individual notice of the action. Instead,
    objective facts. (See 1 Newberg on Class Actions (5th ed. 2011)
    § 3:5, p. 168 [“[c]ourts generally deny certification when the
    putative class is defined by class members’ state of mind”]; see
    also Mullins, supra, 795 F.3d at p. 660; Simer v. Rios (7th
    Cir.1981) 
    661 F.2d 655
    , 669-670.)
    33
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    the law adopts a more nuanced and pragmatic approach,
    consistent with the general principle that when an important
    judicial mechanism for advancing the social good is involved, “A
    construction of the Due Process Clause which would place
    impossible or impractical obstacles in the way could not be
    justified.” (Mullane v. Central Hanover Tr. Co. (1950) 
    339 U.S. 306
    , 313-314 (Mullane).)
    Mullane, 
    supra,
     
    339 U.S. 306
     provides the touchstone for
    assessing how due process informs the provision of notice in the
    context of a class action. The court in Mullane recognized that
    “[a]n elementary and fundamental requirement of due process
    in any proceeding which is to be accorded finality is notice
    reasonably calculated, under all the circumstances, to apprise
    interested parties of the pendency of the action and afford them
    an opportunity to present their objections. [Citations.] The
    notice must be of such nature as reasonably to convey the
    required information, [citation], and it must afford a reasonable
    time for those interested to make their appearance [citations].”
    (Id., at p. 314.) Significantly, the court drew the following line:
    “But if with due regard for the practicalities and peculiarities of
    the case these conditions are reasonably met, the constitutional
    requirements are satisfied. ‘The criterion is not the possibility
    of conceivable injury but the just and reasonable character of
    the requirements, having reference to the subject with which the
    statute deals.’ ” (Id., at pp. 314-315.)
    Applying these principles, the court in Mullane, 
    supra,
    339 U.S. 306
     reasoned that in connection with a particular
    judicial settlement of accounts, notice by personal mail was
    required for beneficiaries whose identities and mailing
    addresses were actually known. (Id., at p. 318.) Yet, “in view of
    the character of the proceedings and the nature of the interests”
    34
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    involved, notice by publication would suffice for those
    beneficiaries “whose interests or whereabouts could not with
    due diligence be ascertained.” (Id., at p. 317.) Likewise, “more
    certain notice” could be dispensed with for those beneficiaries
    “whose interests are either conjectural or future or, although
    they could be discovered upon investigation, do not in due course
    of business come to knowledge of the common trustee.” (Ibid.)
    This notice scheme was “the best practicable, ‘reasonably
    calculated, under all the circumstances, to apprise interested
    parties of the pendency of the action and afford them an
    opportunity to present their objections.’ ” (Shutts, supra, 472
    U.S. at p. 812, quoting Mullane, at pp. 314-315, italics added.)
    Our case law has adopted a similarly practical approach,
    in which the circumstances of each case determine what forms
    of notice will adequately address due process concerns. (See
    Linder, 
    supra,
     23 Cal.4th at p. 444 [describing the notice inquiry
    as entailing due consideration of “the necessity, feasibility and
    costs of any particular form of notice”].) Recall that in Daar,
    supra, 
    67 Cal.2d 695
    , examined ante, we found the allegations
    in the complaint sufficient to state a viable class even as to
    taxicab customers who paid in cash, for whom the prospect of
    individualized notice was far-fetched at best. (Id., at p. 714.) In
    doing so, we disavowed any “necessity of identifying the
    individual members of such class as a prerequisite to a class
    suit. If the existence of an ascertainable class has been shown,
    there is no need to identify its individual members in order to
    bind all members by the judgment.” (Id., at p. 706.) We then
    added, “The fact that the class members are unidentifiable at
    this point will not preclude a complete determination of the
    issues affecting the class.”            (Ibid., italics added.)
    “Unidentifiable” means more than just unidentified. Our use of
    35
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    the former term conveyed that in a case such as Daar, due
    process does not demand that the proponent of class treatment
    demonstrate, as a prerequisite for certification, that (much less
    how) class members eventually will receive individual notice of
    the action.
    Since then, we have observed that individual notice may
    not always be required even for absent class members whose
    whereabouts are known, explaining “the representative plaintiff
    in a California class action is not required to notify individually
    every readily ascertainable member of his class without regard
    to the feasibility of such notice; he need only provide meaningful
    notice in a form that ‘should have a reasonable chance of
    reaching a substantial percentage of the class members.’ ”
    (Archibald v. Cinerama Hotels (1976) 
    15 Cal.3d 853
    , 861,
    quoting Cartt v. Superior Court (1975) 
    50 Cal.App.3d 960
    , 974;
    compare Rule 23(c)(2)(B) [upon certifying a class under Rule
    23(b)(3), “the court must direct to class members the best notice
    practicable under the circumstances including individual notice
    to all members who can be identified through reasonable
    effort”].) One Court of Appeal has elaborated that “when the
    membership of the class is huge, the damages are minimal, and
    res judicata and . . . other problems . . . are insignificant, notice
    by publication is adequate.” (Cooper v. American Sav. & Loan
    Assn. (1976) 
    55 Cal.App.3d 274
    , 285.)
    The pertinent statutes and California Rules of Court are
    in accord. With claims brought as putative class actions under
    the CLRA, “If the action is permitted as a class action, the court
    may direct either party to notify each member of the class of the
    action. The party required to serve notice may, with the
    consent of the court, if personal notification is unreasonably
    expensive or it appears that all members of the class cannot be
    36
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    notified personally, give notice as prescribed herein by
    publication in accordance with Section 6064 of the Government
    Code in a newspaper of general circulation in the county in
    which the transaction occurred.” (Civ. Code, § 1781, subd. (d).)
    In the same spirit, the Rules of Court prescribe an array of
    considerations for determining the form or forms of notice that
    should be provided to a certified class. Pursuant to rule 3.766(e)
    of the California Rules of Court, “In determining the manner of
    the notice [to class members], the court must consider: [¶]
    (1) The interests of the class; [¶] (2) The type of relief requested;
    [¶] (3) The stake of the individual class members; [¶] (4) The cost
    of notifying class members; [¶] (5) The resources of the parties;
    [¶] (6) The possible prejudice to class members who do not
    receive notice; and [¶] (7) The res judicata effect on class
    members.” The rules of court also provide that “[i]f personal
    notification is unreasonably expensive or the stake of individual
    class members is insubstantial, or if it appears that all members
    of the class cannot be notified personally, the court may order a
    means of notice reasonably calculated to apprise the class
    members of the pendency of the action — for example,
    publication in a newspaper or magazine; broadcasting on
    television, radio, or the Internet; or posting or distribution
    through a trade or professional association, union, or public
    interest group.” (Id., rule 3.766(f), italics added.)
    To summarize, due process does not invariably require
    that personal notice be directed to all members of a class in order
    for a class action to proceed, or for that matter that an individual
    member of a certified class must receive notice to be bound by a
    judgment. (See Juris v. Inamed Corp. (11th Cir. 2012) 
    685 F.3d 1294
    , 1321 [citing cases]; 7AA Wright et al., Federal Practice &
    Procedure (3d ed. 2005) § 1789.1, p. 571.) It follows that a
    37
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    construction of the ascertainability requirement that presumes
    such notice is necessary to satisfy due process, and demands
    that the plaintiff show how it can be accomplished, threatens to
    demand too much, too soon. It is likewise mistaken to take a
    categorical view that the relevant due process interests can be
    satisfied only when “official records” (Rose, supra, 126
    Cal.App.3d at p. 932) supply the means of identifying class
    members, and for a similar reason: due process is not that
    inflexible.13
    The Court of Appeal below recognized the possibility that
    due process might not require individual notice to absent class
    members in all circumstances. As recounted ante, the Court of
    Appeal noted that the court in Aguirre, supra, 
    234 Cal.App.4th 1290
     had declined to require such notice to consumers within
    the plaintiff class. (Noel, supra, 17 Cal.App.5th at p. 1331.) It
    distinguished Aguirre on the ground that the class in that case
    was much larger than the proposed class is here. (Noel, at
    p. 1331.) We believe the point is more fundamental: As a rule,
    a representative plaintiff in a class action need not introduce
    evidence establishing how notice of the action will be
    communicated to individual class members in order to show an
    ascertainable class.
    This bright-line rule maintains the straightforward
    nature of what is properly understood as a threshold
    requirement for class certification, and allows for the relevant
    13
    As a somewhat distinct point, we also observe that
    premising ascertainability on the existence of official records
    capable of being used to identify class members might, in some
    situations, incentivize potential class action defendants to
    destroy or refuse to maintain useful records that could provide
    a basis for class treatment.
    38
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    due process interests to be more sensitively calibrated and
    addressed through other mechanisms.               As shown, the
    development of a notice plan that comports with due process
    implicates a diverse array of considerations. (See Cal. Rules of
    Court, rule 3.766(f); Linder, 
    supra,
     23 Cal.4th at pp. 444, 446.)
    Some of the facts relevant to the development of a
    constitutionally adequate notice plan normally will not be
    immediately obvious from the class definition itself. Regardless
    of the size of the class or other relevant circumstances, a demand
    that the representative plaintiff show how individualized notice
    could be provided to class members in order to establish an
    ascertainable class could preempt a more careful, nuanced, and
    potentially collaborative assessment, and in doing so impose
    upon the plaintiff an absolute requirement that closer review of
    all of the relevant facts could demonstrate to be excessive in
    light of the interests involved.
    This case illustrates the problem. The record before us
    does not establish all of the facts and circumstances relevant to
    a determination regarding the appropriate form or forms of
    notice to the class. Yet the record casts substantial doubt on the
    proposition that due process can be satisfied only through the
    provision of individual notice to the approximately 20,000
    members of the putative class. For one thing, these purchasers
    may not be reasonably identifiable. Meanwhile, given the
    modest amount at stake (the pool having retailed for $59.99),
    the odds that any class member will bring a duplicative
    individual action in the future are effectively zero. Thus the
    true choice in this case is not between a single class action
    challenging the packaging of the Ready Set Pool and multiple
    individual actions pressing similar claims; it is between a class
    action and no lawsuits being brought at all. Under the
    39
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    circumstances, due process may not demand personal notice to
    individual class members, and to build a contrary assumption
    into the ascertainability requirement would be a mistake.14
    Reading into the ascertainability element an additional
    requirement that the identification of class members must occur
    “ ‘without unreasonable expense or time’ ” (Sotelo, supra, 207
    Cal.App.4th at p. 648) runs a similar risk of preempting a more
    careful analysis later. Our jurisprudence addressing class
    certification has stressed the importance of a careful weighing
    of both the benefits and the burdens that may be associated with
    a proposed class action. (See, e.g., Linder, 
    supra,
     23 Cal.4th at
    pp. 445-446.) A conception of ascertainability as concerned with
    whether class members can be identified without an
    unreasonable commitment of expense or time is at cross
    purposes with this direction. As the court in Mullins supra,
    795 F.3d at pages 663 to 664 explained in rejecting a similar
    expansion of the ascertainability requirement, such an approach
    trains the court’s attention, at a threshold juncture, exclusively
    toward the side of the ledger where costs and challenges are
    compiled. This focus means that full attention will not
    necessarily be given to countervailing considerations — such as
    whether these difficulties, although present, might nevertheless
    be effectively managed through application of the various tools
    and resources courts have at their disposal for effective
    14
    To be clear, we have no occasion at this time to decide
    precisely what would constitute adequate notice to absent
    members of the proposed class in this case. Presumably, after
    remand any and all appropriate inquiries will be made into
    matters relevant to the provision of adequate notice.
    40
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    supervision of a class proceeding, and whether, notwithstanding
    possible notice issues, an appropriately supervised class action
    nevertheless can be expected to deliver benefits that, from a
    comparative perspective, would make it preferable to
    alternative courses of action.15
    15
    Numerous decisions by the Courts of Appeal, in addition
    to the opinion below, have invoked and applied the standard for
    ascertainability originally set forth in Rose v. City of Hayward,
    supra, 126 Cal.App.3d at page 932, providing that “[c]lass
    members are ‘ascertainable’ where they may be readily
    identified without unreasonable expense or time by reference to
    official records.” (See Hefczyc v. Rady Children’s Hospital-San
    Diego (2017) 
    17 Cal.App.5th 518
    , 536-540; Kendall v. Scripps
    Health (2017) 
    16 Cal.App.5th 553
    , 574-575; Cruz v. Sun World
    Internat., LLC, supra, 243 Cal.App.4th at pp. 375-382; Hale v.
    Sharp Healthcare, supra, 232 Cal.App.4th at pp. 58-61;
    Thompson v. Automobile Club of Southern California, supra,
    217 Cal.App.4th at pp. 728-731; Faulkinbury v. Boyd &
    Associates, Inc., 
    supra,
     216 Cal.App.4th at p. 240; Sotelo v.
    MediaNews Group, Inc., 
    supra,
     207 Cal.App.4th at pp. 648-650;
    Mora v. Big Lots Stores, Inc., 
    supra,
     194 Cal.App.4th at p. 504;
    Bomersheim v. Los Angeles Gay & Lesbian Center, supra, 184
    Cal.App.4th at p. 1481; Ghazaryan v. Diva Limousine, Ltd.,
    supra, 169 Cal.App.4th at pp. 1532-1533; Lee v. Dynamex, Inc.,
    
    supra,
     166 Cal.App.4th at p. 1334; Bufil v. Dollar Financial
    Group, Inc., 
    supra,
     162 Cal.App.4th at pp. 1206-1208; Aguiar v.
    Cintas Corp. No. 2, supra, 144 Cal.App.4th at pp. 135-136.) As
    our analysis should make clear, this is one way but not the only
    way to show an ascertainable class. We therefore disapprove of
    this standard insofar as it could be perceived as exclusive.
    Likewise, insofar as the three-factor approach to
    ascertainability set forth in Miller, supra, 148 Cal.App.3d at
    page 873 could be read to demand a more exacting inquiry than
    the approach we endorse today, we disapprove of it, as well.
    41
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    Our view of the ascertainability requirement does not
    prohibit a court asked to certify a class from considering the
    separate question of notice to absent class members. Arguments
    and evidence relating to the provision of notice to the class
    conceivably could counsel against class certification insofar as
    they may show that another requirement for a proper class
    proceeding, aside from ascertainability, has not been met — e.g.,
    that a class action would be unmanageable, even after due
    consideration is given to how manageability concerns could be
    resolved; or that a class proceeding would not be superior to the
    alternatives. (Accord, Mullins, 795 F.3d at p. 664 [“If faced with
    what appear to be unusually difficult manageability problems
    at the certification stage, district courts have discretion to insist
    on details of the plaintiff’s plan for notifying the class and
    managing the action.”].)16 But, at the risk of repetition, we
    conclude that these issues, where they exist, are appropriately
    addressed outside of and separately from the ascertainability
    requirement.
    2. The trial court abused its discretion when it found no
    ascertainable class existed
    It follows from the analysis above that the trial court erred
    when it determined that the class proposed by plaintiff is not
    ascertainable. It is. The phrasing, “All persons who purchased
    16
    Even though class definition is logically antecedent to the
    question of how notice is to be provided to the class (see Fireside
    Bank, supra, 40 Cal.4th at p. 1074; Home Savings & Loan Assn.
    v. Superior Court (1974) 
    42 Cal.App.3d 1006
    , 1010) and notice
    is commonly addressed after class certification (see, e.g., Linder,
    
    supra,
     23 Cal.4th at p. 444), contemporaneous inquiries into
    both class definition and notice are permissible under the CLRA
    (see Civ. Code, § 1781, subd. (c)(1), (2)) and the rules of court
    (Cal. Rules of Court, rule 3.766(c)).
    42
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    the Ready Set Pool at a Rite Aid store located in California
    within the four years preceding the date of the filing of this
    action” is neither vague nor subjective. A member of the class
    could appreciate from this definition whether he or she is
    included within it, and thus be in a position to take appropriate
    steps to protect his or her interests. And the definition makes
    the res judicata consequences of a judgment clear, creating no
    ambiguity as to who will and will not be bound by the outcome.
    (See Daar, supra, 67 Cal.2d at p. 706.)17
    To the extent that the trial court had concerns regarding
    the state of the record as it pertained to matters such as the
    provision of notice to class members, or how burdensome it
    would be to identify class members, those issues should not have
    been resolved in the context of ascertainability. And regardless
    of whether plaintiff’s failure to supply evidence associated with
    the identification of class members might have supported a
    refusal to certify a class on some other ground (but cf. Daar,
    supra, 67 Cal.2d at p. 706), it manifestly did not justify a failure
    to find an ascertainable class. Our review ends there. (See
    Linder, 
    supra,
     23 Cal.4th at p. 436.)
    III. DISPOSITION
    As noted ante, the trial court denied the motion for class
    certification in its entirety on ascertainability grounds. That
    17
    The record developed below does not establish whether
    Rite Aid sold Ready Set Pools in other sizes during the class
    period. If so, the class definition’s reference to purchasers of “the
    Ready Set Pool” (italics added) may require clarification, to
    establish that only purchasers of the model measuring eight feet
    by 25 inches are included within the class. This flaw within the
    definition would not, however, mean that the class is not
    ascertainable.
    43
    NOEL v. THRIFTY PAYLESS, INC.
    Opinion of the Court by Cantil-Sakauye, C. J.
    court also denied certification of the proposed CLRA class on the
    basis that common issues did not predominate. Because we do
    not address the latter aspect of the trial court’s ruling here,
    overturning its ascertainability determination would not, by
    itself, make a CLRA class viable. The trial court also offered a
    third justification for denying class certification that was
    ambiguous in its scope. It is unclear whether the trial court had
    only the proposed CLRA class in mind when it determined that
    a class action would not be superior to the alternatives, or
    whether this conclusion applied to the entirety of the action. It
    also cannot be discerned from this vantage point whether the
    court’s erroneous view of ascertainability informed its analysis
    on this issue. Because of these uncertainties, we reverse the
    judgment below and remand the case to the Court of Appeal
    with directions to remand the matter to the superior court for
    further proceedings consistent with our decision.
    CANTIL-SAKAUYE, C. J.
    We Concur:
    CHIN, J.
    CORRIGAN, J.
    LIU, J.
    CUÉLLAR, J.
    KRUGER, J.
    GROBAN, J.
    44
    See next page for addresses and telephone numbers for counsel who argued in Supreme Court.
    Name of Opinion Noel v. Thrifty Payless, Inc.
    __________________________________________________________________________________
    Unpublished Opinion
    Original Appeal
    Original Proceeding
    Review Granted XXX 
    17 Cal.App.5th 1315
    Rehearing Granted
    __________________________________________________________________________________
    Opinion No. S246490
    Date Filed: July 29, 2019
    __________________________________________________________________________________
    Court: Superior
    County: Marin
    Judge: Paul M. Haakenson
    __________________________________________________________________________________
    Counsel:
    Emergent Legal, Emergent, Christopher Wimmer, Peter Roldan; Public Justice, Leslie Brueckner and Karla
    Gilbride for Plaintiff and Appellant.
    Chavez & Gertler, Mark A. Chavez; Public Citizen Ligation Group and Allison M. Zieve for Public Citizen
    as Amicus Curiae on behalf of Plaintiff and Appellant.
    Rock Law, Matt J. Malone; Nelson & Fraenkel, Gretchen M. Nelson; Arbogast Law and David M.
    Arbogast for Consumer Attorneys of California as Amicus Curiae on behalf of Plaintiff and Appellant.
    Lieff Cabraser Heimann & Bernstein, Robert J. Nelson, Roger N. Heller and Melisa Gardner for National
    Consumer Law Center and National Association of Consumer Advocates as Amici Curiae on behalf of
    Plaintiff and Appellant.
    Jocelyn D. Larkin and Daniel Nesbit for Impact Fund, California Employment Lawyers Association,
    Centro Legal de la Raza, Legal Aid at Work and Worksafe as Amici Curiae on behalf of Plaintiff and
    Appellant.
    Kelly, Hockel & Klein, Klein, Hockel, Iezza & Patel, Michael D. Early and Mark P. Iezza for Defendant
    and Respondent.
    Utrecht & Lenvin and Paul F. Utrecht for Washington Legal Foundation and California Retailers
    Association as Amici Curiae on behalf of Defendant and Respondent.
    Counsel who argued in Supreme Court (not intended for publication with opinion):
    Leslie Brueckner
    Public Justice
    475 14th Street, Suite 610
    Oakland, CA 94612
    (510) 622-8205
    Michael D. Early
    Klein, Hockel, Iezza & Patel
    455 Market Street, Suite 1480
    San Francisco, CA 94105
    (415) 951-0535