Anderson v. Sanchez , 2015 NV 51 ( 2015 )


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  •                                                        131 Nev., Advance Opinion    51
    IN THE COURT OF APPEALS OF THE STATE OF NEVADA
    MARK ANDERSON,                                         No. 62059
    Appellant,
    vs.                                                        FILED
    SOPHIA SANCHEZ,
    Respondent.                                                 JUL 2 3 2015
    7 K. 77:7777777
    •E
    Appeal from a district court divorce decree. Fifth Judicial
    District Court, Nye County; Kimberly A. Wanker, Judge.
    Reversed and remanded with instructions.
    Abrams Law Firm, LLC, and Vincent Mayo, Las Vegas,
    for Appellant.
    Law Office of Daniel Marks and Daniel Marks and Christopher L.
    Marchand, Las Vegas,
    for Respondent.
    BEFORE GIBBONS, C.J., TAO and SILVER, JJ.
    OPINION
    By the Court, GIBBONS, C.J.:
    This case involves the enforceability of a divorce settlement
    agreement in the face of a claim that the agreement distributes property
    belonging to a third party. At issue here is the district court's denial of
    appellant's motion to set aside the parties' settlement agreement, and join
    his sister to the underlying divorce proceeding, because she claimed an
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    interest in property that was treated as community property in the
    settlement agreement. Under NRCP 19(a), a court must join a person to
    an action if complete relief cannot be accorded among the parties already
    present, or the person to be joined claims to have an interest in the subject
    matter of the action, and adjudication of the action in the person's absence
    may either impair the person's ability to protect that interest, or leave any
    of the current parties subject to double, multiple, or otherwise inconsistent
    obligations due to the claimed interest.
    In light of this rule and the facts in this case, we conclude the
    district court should have conducted an evidentiary hearing to decide the
    joinder issues before the court adjudicated the parties' property pursuant
    to the settlement agreement. We therefore vacate the district court's
    divorce decree only as it affects the disposition of the property at issue and
    remand this matter to the district court with instructions to conduct an
    evidentiary hearing to determine whether the sister should have been
    joined under NRCP 19(a).
    BACKGROUND
    This appeal arises out of a divorce between appellant Mark
    Anderson and respondent Sophia Sanchez. Mark filed a complaint for
    divorce in March 2012. Thereafter, the parties immediately agreed to
    participate in mediation before retired district court judge Robert Gaston,
    but not pursuant to a court order or district court rule, which can be used
    to set the parameters of the mediation. At the conclusion of the mediation,
    the parties executed a written Memorandum of Understanding (MOU),
    which provided the framework for dividing their various assets and debts.
    The award of the Wilson property, a residence located on East Wilson
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    Avenue, Orange, California, is the only term of the MOU challenged on
    appeal. Under the terms of the MOU, Mark was to receive the Wilson
    property in exchange for the payment of a portion of his retirement funds
    to Sophia.
    After the parties executed the MOU, Mark filed a notice of
    withdrawal of his signature, stating, without any explanation or citation
    to law, that he was revoking his signature from the MOU. In response,
    Sophia filed a motion to enforce the MOU, asserting that the parties had
    entered into a legally binding contract and requesting that the district
    court enter a divorce decree based on the terms of the MOU. Mark then
    filed, among other things, an opposition to the motion to enforce, a
    countermotion to set aside and deem the MOU unenforceable, and a
    countermotion for joinder of his sister, Cheryl Parr. Cheryl also filed a
    motion to intervene in the divorce proceeding based on the same factual
    allegations set forth in Mark's opposition and countermotion regarding
    joinder, and she asked for a finding and order that the Wilson property
    was held in constructive trust, declaratory relief, an injunction, and
    attorney fees.
    In his opposition and countermotions, Mark argued, as
    relevant here, that the MOU was void because it improperly distributed
    property that did not belong to Mark and Sophia. Further, Mark argued
    the MOU was subject to rescission because it was based on a mutual
    mistake, a misrepresentation, or unconscionable terms. In support of
    these arguments, Mark alleged Cheryl had an ownership interest in the
    Wilson property, which he and Cheryl had received as beneficiaries of the
    Jack and Lavonne Anderson Trust (the Jack and Lavonne Trust), which
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    previously held that property. Mark claimed he and Cheryl had agreed
    Cheryl would keep the Wilson property in exchange for Mark receiving
    other trust assets. Cheryl currently lives on the Wilson property.
    Continuing his arguments in support of joinder and setting
    aside the MOU, Mark alleged that, between May 2005 and May 2006, he
    and Sophia entered into two agreements with Cheryl in which Cheryl
    allowed them to use the Wilson property as collateral to secure loans. In
    order to obtain financing, the second agreement required Mark and
    Cheryl, as trustees of the Jack and Lavonne Trust, to convey the Wilson
    property to Mark and Sophia. Mark and Sophia then transferred the
    Wilson property to their own newly created trust, the Anderson Trust.
    The Anderson Trust provides that the Wilson property is to be conveyed to
    Cheryl should she survive both Mark and Sophia. Additionally, David
    Parr, Cheryl's son, is named as a beneficiary of the Anderson Trust,
    should he survive Cheryl, Mark, and Sophia. The Anderson Trust was not
    made a party in this case. None of Mark and Sophia's five other
    properties are held in a trust.
    Mark contended he and Sophia entered into an oral agreement
    with Cheryl whereby he and Sophia would transfer the Wilson property to
    Cheryl after all loans were satisfied. Until such time, however, Mark and
    Sophia would hold the Wilson property in the trust for Cheryl's benefit.
    Thus, in his opposition and countermotions, Mark argued the agreement
    created a resulting trust or a constructive trust for Cheryl's benefit.
    Mark filed several statements in district court by individuals
    familiar with the arrangement to prove the oral agreements. These
    included an affidavit signed by Mark and Sophia's accountant, who
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    provided a loan collateralized by the Wilson property; a letter signed by
    the trust attorney who drafted the Anderson Trust, which recited his
    understanding that the property was held in Mark's name, but was
    actually owned by Cheryl; a notarized statement signed by Israel Sanchez,
    Sophia's brother, which outlined his understanding of Mark and Sophia's
    arrangement with Cheryl, consistent with Mark's contentions; and the
    Anderson Trust agreement, which held the Wilson property at the time of
    divorce and which provided that the Wilson property would go to Cheryl
    free of encumbrances following the deaths of both Sophia and Mark if she
    survived them. Based on his contention that Cheryl was the true owner of
    the Wilson property, Mark maintained that Cheryl must be joined to the
    action pursuant to the provisions of NRCP 19(a).
    Sophia filed a reply in support of her motion to enforce the
    settlement agreement and an opposition to Mark's countermotions. She
    denied the existence of an agreement between herself, Mark, and Cheryl,
    referring to the alleged agreement as "a secret deal between [Mark] and
    his sister." Sophia contended she and Mark were the rightful owners of
    the Wilson property, as they, not Cheryl, paid the mortgage and property
    taxes on the Wilson property and because a quitclaim deed released the
    property to Mark and Sophia forever.
    The district court held two hearings on the various motions.
    In rendering its decisions, the district court stated at the hearings, "I don't
    know how Cheryl [Parr] would—could become a party in this case. We're
    talking about a piece of property in California, so we don't—we don't have
    jurisdiction over a property in California. She's not a party to this
    proceeding. This is a divorce." Second, the district court stated, "[a]
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    settlement was reached. . .. It was placed in writing. And now what I
    hear is that somehow that—that really there was this constructive trust
    regarding this California property that fi] s the problem. Those facts were
    known to [Mark]. Those facts were known to [Sophia]." Third, the district
    court emphasized the importance that "[Mark and Sophia are] legal
    owners of the property."
    After the second hearing, the district court issued an order
    that (1) granted Sophia's motion to enforce the MOU, (2) denied all of
    Mark's countermotions, and (3) denied Cheryl's motion to intervene and
    related motions. In addition to concluding the MOU was a valid and
    binding agreement, the district court found that Cheryl lacked standing to
    intervene and that the court lacked jurisdiction to allow her to intervene.'
    The court also entered a decree of divorce dissolving Mark and Sophia's
    marriage and incorporating the MOU. This appeal by Mark followed.
    ANALYSIS
    Mark maintains that the arrangement with Cheryl created an
    implied trust for Cheryl's benefit. Therefore, he asserts that when he and
    Sophia divided the Wilson property as part of their community property,
    they mistakenly included property that belonged to Cheryl. Thus, Mark
    'Cheryl was never made a party to the district court action and is
    thus not a party to this appeal. Moreover, because Cheryl did not file a
    petition for a writ of mandamus challenging the denial of her motion to
    intervene, the denial of that motion is not before us. Nevertheless, the
    district court's comments in this regard are equally relevant to the denial
    of Mark's joinder motion as they were to the denial of Cheryl's motion to
    intervene.
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    contends that the MOU should be set aside as to that provision and the
    matter should be remanded to the district court for further proceedings in
    which Cheryl's interest in the Wilson property is determined. Sophia
    disagrees, arguing that the parties entered into an enforceable settlement
    agreement and that joinder of Cheryl was not required.
    This court reviews de novo a district court's legal conclusions
    relating to court rules. Casey v. Wells Fargo Bank, N.A., 128 Nev. ,
    
    290 P.3d 265
    , 267 (2012). Subject matter jurisdiction is similarly reviewed
    de novo. Ogawa v. Ogawa, 
    125 Nev. 660
    , 667, 
    221 P.3d 699
    , 704 (2009).
    Generally, when parties to a divorce have entered into a
    signed, written settlement agreement, such agreement is binding and "can
    be enforced by motion in the case being settled." Grisham v. Grisham, 128
    Nev. „ 
    289 P.3d 230
    , 233 (2012). Nevertheless, in order to render a
    complete decree in any civil action, "all persons materially interested in
    the subject matter of the suit [must] be made parties so that there is a
    complete decree to bind them all."      Gladys Baker Olsen Family Trust ex
    rel. Olsen v. Eighth Judicial Dist. Court, 
    110 Nev. 548
    , 553, 
    874 P.2d 778
    ,
    781 (1994). For that reason, the Nevada Supreme Court has held that the
    failure to join a necessary party to a case was "fatal to the district court's
    judgment." 
    Id. at 554,
    874 P.2d at 782. In light of this authority, we
    conclude that, if Cheryl was a necessary party, the district court's
    judgment was invalid to the extent that it affected rights in property in
    which Cheryl claimed an interest. See 
    id. Thus, we
    begin by considering
    Mark's argument that the district court erred by denying his motion to
    join Cheryl in the underlying action.
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    Joinder of necessary parties
    Although NRCP 19(a) refers to parties who are to be joined if
    feasible, a person who falls within that subsection of the rule is generally
    referred to as a "necessary party."   See Disabled Rights Action Comm. v.
    Las Vegas Events, Inc., 
    375 F.3d 861
    , 878 (9th Cir. 2004) (explaining that
    an individual who should be joined under the analogous federal rule,
    FRCP 19(a), is "referred to as a 'necessary party"); see also Blaine Equip.
    Co., Inc. v. State, 
    122 Nev. 860
    , 864 n.6, 
    138 P.3d 820
    , 822 n.6 (2006)
    (referring to a party who should be joined under NRCP 19(a) as a
    necessary party). There are three types of circumstances in which an
    absent party is necessary under NRCP 19(a): (1) an individual must be
    joined if the failure to join will prevent the existing parties from obtaining
    complete relief; (2) an individual must be joined if an interest is claimed in
    the subject matter of the action and adjudication of the action in the
    individual's absence may inhibit the individual's ability to protect that
    claimed interest; and (3) an individual must be joined if the person claims
    an interest in the subject matter of the action and adjudication of the
    action in the individual's absence subjects an existing party "to a
    substantial risk of incurring double, multiple, or otherwise inconsistent
    obligations." See NRCP 19(a). 2
    2NRCP 19(a) provides that, if a person is subject to service of process
    and that person's joinder will not deprive the court of subject matter
    jurisdiction, then the person "shall be joined as a party in the action if (1)
    in the person's absence complete relief cannot be accorded among those
    already parties, or (2) the person claims an interest relating to the subject
    of the action and is so situated that the disposition of the action in the
    person's absence may (i) as a practical matter impair or impede the
    continued on next page...
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    Without addressing whether this case presented any of the
    circumstances set forth in NRCP 19(a), the district court declined to join
    Cheryl, apparently based on two preliminary conclusions—that the court
    lacked jurisdiction to determine Cheryl's rights in property located in
    another state and that an outside party could not be joined to a divorce
    action. We now address each of these conclusions in turn.
    Jurisdiction over the Wilson property
    Although the district court failed to make specific factual
    findings, its oral comments indicate that it concluded it lacked jurisdiction
    to adjudicate the ownership rights to the Wilson property because the
    property is located outside of Nevada. To that end, the written order
    recites, "Ms. Parr's remedy lies in a different jurisdiction, this Court does
    not have jurisdiction to allow her to intervene into this matter."
    A court of equity, however, may adjudicate out-of-state
    property rights in a divorce action. Buaas v. Buaas, 
    62 Nev. 232
    , 236, 
    147 P.2d 495
    , 496 (1944). In Buass, the former wife appealed a divorce decree
    obtained in Nevada, alleging that the Nevada court lacked jurisdiction to
    adjudicate the status of real property located in California.   
    Id. at 234,
    147
    P.2d at 496. The Nevada Supreme Court held that, although the lower
    court could not render a judgment in rem over the California property, it
    could pass indirectly upon the title via its jurisdiction over the parties. 
    Id. at 236,
    147 P.2d at 496; see also Lewis v. Lewis, 
    71 Nev. 301
    , 306, 289 P.2d
    ...continued
    person's ability to protect that interest or (ii) leave any of the persons
    already parties subject to a substantial risk of incurring double, multiple,
    or otherwise inconsistent obligations by reason of the claimed interest."
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    414, 417 (1955) (stating that a district court possesses control over an out-
    of-state property through jurisdiction over the parties and that the district
    court can exercise such control to avoid multiplicity of suits).
    Here, Mark and Sophia were properly before the district court
    in their divorce proceeding and included the Wilson property among the
    assets to be divided. Further, Cheryl submitted to the district court's
    jurisdiction by filing a motion to intervene in the divorce proceeding. 3
    Thus, although the Wilson property was located in California, the district
    court could have adjudicated the parties' rights to the property based on
    its personal jurisdiction over all of the parties purporting to have an
    interest in the property.     See Buass, 62 Nev. at 
    236, 147 P.2d at 496
    .
    Consequently, the district court erred in concluding it lacked jurisdiction
    to consider Cheryl's interest in the Wilson property based on the
    property's location. We now turn to the court's other apparent conclusion,
    that it could not join a third party to a divorce action.
    Joinder in a divorce action
    In addition to the district court's conclusions relating to the
    location of the property, the district court's comments and written order
    suggest the court found it would be improper to join or allow intervention
    by a third party to a divorce action. We disagree.
    Nothing in NRCP 19(a) limits the type of civil action to which
    a necessary party must be joined. And although the Nevada Supreme
    Court has not specifically addressed whether a third party may be joined
    3 Therefore NRCP 19(b), regarding an absent but indispensable third
    party that could not be feasibly joined, is inapplicable.
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    to a divorce action, that court has held that joinder was required in certain
    post-divorce proceedings. See, e.g., Johnson v. Johnson, 
    93 Nev. 655
    , 659,
    
    572 P.2d 925
    , 927 (1977) (holding that an order requiring an absent third
    party to transfer property was void because the absent third-party
    transferee was not joined in the post-divorce action); Olsen Family Trust,
    110 Nev. at 
    554, 874 P.2d at 782
    (holding that a trust created by a third
    party was a necessary party to a post-divorce action in which the district
    court ordered trust property to be transferred to the appellant to satisfy
    spousal support arrearages). Thus, Nevada case law supports the
    possibility that an absent third party may be joined to a family law action
    in certain circumstances.
    Moreover, courts in other jurisdictions have concluded that a
    third party may be joined to a divorce proceeding when such joinder is
    necessary to resolve disputes as to property rights. For instance, in
    Cadwell v. Cadwell, 
    178 P.2d 266
    , 267 (Kan. 1947), the district court had
    allowed the wife's mother to intervene in the parties' divorce action
    because she had claimed to be the true owner of certain real and personal
    property held by the husband and wife. 4 On appeal, the court noted that,
    generally, "a third person has no legal interest in or right to interfere with
    a divorce action for the purpose of opposing the granting of a decree of
    4 Several of the cases discussed herein consider the issue of bringing
    third parties into divorce cases based on the third party's motion to
    intervene. See, e.g., 
    Cadwell, 178 P.2d at 267-69
    . Although joinder, rather
    than intervention, is at issue in this appeal, these cases are relevant to the
    consideration of whether the third party may properly be made a party to
    a divorce action. Whether a party is necessary, such that joinder is
    required, is discussed separately below.
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    divorce." 
    Id. at 268.
    Nevertheless, the court recognized that, when the
    third person seeks to intervene based on a claim of a right to property held
    by the divorcing parties, courts have typically held that intervention for
    such a purpose is proper. 
    Id. at 268-69.
                                   Similarly, in Wharff v. Wharff, 
    56 N.W.2d 1
    , 2 (Iowa 1952), a
    divorcing wife alleged that real property titled in the parties' names was
    actually purchased with her separate money and was "held in trust for her
    children by a previous marriage." On this basis, the children moved to
    intervene in the divorce to assert their interest in the property.        
    Id. Concluding that
    intervention in divorce cases was typically subject to the
    ordinary rules of civil procedure, the Wharf court noted that intervention
    is generally proper when a third person "claims an interest in property
    involved in litigation." 
    Id. at 3-4.
    The court recognized that allowing
    intervention would help avoid a multiplicity of suits and the possibility
    that the division of property in a divorce might be rendered inequitable if
    property divided in the divorce is later awarded to the third person in a
    separate action. 
    Id. at 4.
                                   These cases represent the majority view that a third person
    may be joined as a party to a divorce action based on a claimed interest in
    real or personal property that is to be divided among the divorcing parties.
    See also Copeland v. Copeland, 
    616 S.W.2d 773
    , 775 (Ark. Ct. App. 1981)
    ("Third parties may be brought into, or intervene in, divorce actions for the
    purpose of clearing or determining the rights of the spouses in specific
    properties."); Gaudio v. Gaudio, 
    580 A.2d 1212
    , 1217 (Conn. App. Ct. 1990)
    ("The prevailing view in the majority of other jurisdictions is that a third
    person with a claimed interest in property that is the subject of a
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    dissolution action may properly be joined as a party."); Lancaster v.
    Lancaster, 
    291 S.W.2d 303
    , 308 (Tex. 1956) ("On a petition for divorce and
    for partition of the community property, all persons who have an interest
    in the property are proper parties.").
    Thus, considering this extrajurisdictional authority in light of
    the Nevada Supreme Court cases indicating that joinder may be proper in
    family law cases, we conclude that a third person may be joined to a
    divorce action when that person claims an interest in property that is
    purported to be part of the marital estate. As a result, the district court
    erred to the extent that it apparently found that Cheryl could not be joined
    because the underlying action was a divorce action.
    But having determined that Cheryl could have been joined in
    the underlying divorce action does not end our inquiry because Mark did
    not move for joinder of Cheryl until after he signed the MOU. Generally,
    when parties to a divorce have entered into a signed, written settlement
    agreement, such agreement is binding and "can be enforced by motion in
    the case being settled." Grisham, 128 Nev. at , 289 P.3d at 233. Mark
    attempts to avoid the binding effect of the agreement by arguing both that
    Cheryl was a necessary party under NRCP 19(a) and that the MOU was
    subject to being set aside based on the parties' mutual mistake as to the
    nature of Cheryl's interest in the Wilson property. We address these
    arguments in turn.
    Necessary party
    As noted above, in order to render a complete decree in any
    civil action, "all persons materially interested in the subject matter of the
    suit [must] be made parties so that there is a complete decree to bind them
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    all."   Olsen Family 
    Trust, 110 Nev. at 553
    , 874 P.2d at 781. For this
    reason, the Nevada Supreme Court has held that the failure to join a
    necessary party to a case was "fatal to the district court's judgment."   
    Id. at 554,
    874 P.2d at 782; see also Univ. of Nev. v. Tarkanian, 
    95 Nev. 389
    ,
    396, 
    594 P.2d 1150
    , 1163 (1979) (explaining that "the question of waiver is
    not appropriate to the determination of [a joinder] issue, and the trial
    court or the appellate court may raise the issue sua sponte").      Thus, if
    Cheryl was a necessary party, the district court's judgment was invalid to
    the extent it resolved any issues for which Cheryl's joinder was necessary.
    See 
    Tarkanian, 95 Nev. at 396
    , 594 P.2d at 1163.
    As discussed above, NRCP 19(a) requires joinder in three
    situations—when the failure to join the individual will prevent the parties
    to the case from obtaining complete relief, when the individual claims an
    interest in the subject matter of the action and adjudication in the
    individual's absence may inhibit the ability to protect that claimed
    interest, and when the individual claims an interest in the subject matter
    of the action and adjudication in the individual's absence potentially
    subjects an existing party to "double, multiple, or otherwise inconsistent
    obligations." In applying NRCP 19(a), the Nevada Supreme Court has
    broadly indicated that a third party must be joined if the third party's
    interest "may be affected or bound by the decree," or if the third party
    "claims an interest in the subject matter of the action."     Olsen Family
    
    Trust, 110 Nev. at 553
    -54, 874 P.2d at 781-82.
    Generally, the subject matter of a divorce action will involve
    the division of the parties' property, but may not necessarily require the
    court to determine title to the property or otherwise establish ownership.
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    See Aniballi v. Aniballi, 
    842 P.2d 342
    , 343 (Mont. 1992) (noting that "a
    decree of dissolution resolves rights to the marital property as between the
    parties seeking dissolution of the marriage, but will not determine title in
    rem").   Instead, the parties may simply divide their interest in the
    property, leaving any interests of third parties undisturbed.       See id.; see
    also Walters v. Walters, 
    113 S.W.3d 214
    , 219 (Mo. Ct. App. 2003)
    (recognizing that the trial court did not need to determine the relative
    interests of a couple and the husband's mother in property being divided
    in a divorce proceeding, but could properly divide only the couple's interest
    by awarding " laJny interest the parties may have' in the property).
    Nevertheless, in some cases, such as this one, the parties may
    dispute the extent of their interest in the property, putting ownership of
    the property at issue in the divorce proceeding     See Callnon v. Callnon, 
    46 P.2d 988
    , 990 (Cal. Ct. App. 1935) (recognizing that parties to a divorce
    "may seek a determination of their property rights"). As discussed above,
    in that situation, a third party who claims an interest in the property
    generally may be joined to the action and the action will be binding on
    that party.    See 
    id. Conversely, any
    third party not joined will not be
    bound by the• determination of ownership in the divorce action.             See
    
    Johnson, 93 Nev. at 658
    , 572 P.2d at 927 (recognizing that a third party
    would not be legally bound by an order entered in an action to which the
    third party had not been joined).
    Here, insofar as Cheryl will not be bound by the action if she is
    not joined, it does not appear that her ability to protect her claimed
    interest in the Wilson property would be impaired or impeded, as she will
    be able to file a separate action to enforce her claimed interest.          See
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    Aniballi, 842 P.2d at 343
    (noting that a parent who claimed an interest in
    the parties' marital residence would not be prevented by the divorce
    decree from bringing a separate action to determine the interest in the
    property). Indeed, Sophia asserted in her appellate brief that Cheryl has
    filed a lawsuit in Orange County, California, against Mark and Sophia.
    As a result, Cheryl does not appear to be a necessary party
    under NRCP 19(a)(2)(i), which requires joinder when a third party claims
    an interest in the subject matter of the action and the third party's
    absence from the litigation may impair or impede the person's ability to
    protect that interest. But that ability to file a separate action raises
    questions as to whether, in Cheryl's absence, the existing parties will be
    able to obtain complete relief, and whether the failure to join Cheryl may
    leave Mark "subject to a substantial risk of incurring double, multiple, or
    otherwise inconsistent obligations," and thus, whether Cheryl may be a
    necessary party under NRCP 19(a)(1) or NRCP 19(a)(2)(ii).                See
    
    Tarkanian, 95 Nev. at 397-98
    , 594 P.2d at 1164 (concluding that complete
    relief could not be afforded among existing parties where resolution in the
    absence of a third party would not "completely and justly" determine the
    rights and obligations presented by the action); see also NRCP 1 (providing
    that the rules of civil procedure "shall be construed and administered to
    secure the just, speedy, and inexpensive determination of every action").
    Because the district court erroneously determined that it did
    not have authority to join Cheryl based on the location of the Wilson
    property and the nature of the action as a divorce proceeding, the court
    failed to consider whether complete relief could be afforded among the
    parties in Cheryl's absence, or whether Cheryl's absence might leave any
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    of the existing parties subject to a substantial risk of double, multiple, or
    otherwise inconsistent obligations. But insofar as Cheryl may seek relief
    in another jurisdiction with regard to the Wilson property, it appears
    reasonably possible that her absence may cause any relief afforded in the
    district court to be incomplete, or may leave Mark subject to a potential
    risk of multiple, double, or inconsistent obligations.   See NRCP 19(a)(1),
    (a)(2)(ii).
    Determining the potential effect of any litigation by Cheryl
    may require the resolution of factual issues. Therefore, we reverse the
    district court's denial of joinder and remand this case to the district court
    for that court to consider whether Cheryl was a necessary party within the
    meaning of NRCP 19(a).        See Ryan's Express Transp. Servs., Inc. v.
    Amador Stage Lines, Inc., 128 Nev. „ 
    279 P.3d 166
    , 172 (2012) ("An
    appellate court is not particularly well-suited to make factual
    determinations in the first instance."); see also Nev. Power Co. v. Fluor
    
    108 Nev. 638
    , 645, 
    837 P.2d 1354
    , 1359 (1992) (recognizing that an
    evidentiary hearing may be necessary in order to properly decide disputed
    questions of fact).
    If the district court determines that Cheryl is a necessary
    party, the court must then determine the relative rights of Mark, Sophia,
    and Cheryl in the Wilson property, see 
    Callnon, 46 P.2d at 990
    , and must
    revisit the portions of the MOU concerning that property, as appropriate.
    In the event the district court does not find the circumstances to fall
    within the parameters of NRCP 19(a), Mark contends the MOU may still
    be set aside based on mutual mistake. Thus, in the final section of this
    opinion, we turn to his mutual mistake argument.
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    Mutual mistake
    Mark argues the district court erred by failing to set aside the
    MOU based on mutual mistake and other contract defenses. Sophia, on
    the other hand, contends the MOU was properly upheld because no
    mutual mistake occurred. A contract may be set aside based on mutual
    mistake, which "occurs when both parties, at the time of contracting,
    share a misconception about a vital fact upon which they based their
    bargain." Gen. Motors v. Jackson, 
    111 Nev. 1026
    , 1032, 
    900 P.2d 345
    , 349
    (1995); see also May v. Anderson, 
    121 Nev. 668
    , 672, 
    119 P.3d 1254
    , 1257
    (2005) (providing that a settlement agreement is a contract that is
    governed by contract law).
    In the divorce decree, the district court found "good cause" to
    adopt the MOU over Mark's objections. And in a related order, the court
    concluded that Mark and Sophia had entered into a valid and binding
    agreement pursuant to Casentini v. Hines, 
    97 Nev. 186
    , 
    625 P.2d 1174
                       (1981), which recognizes that a stipulation is enforceable if it is in writing
    and signed by the party against whom enforcement is sought. The district
    court did not, however, specifically address Mark's mutual mistake
    argument by making findings as to whether the MOU was based on the
    parties' "misconception about a vital fact." See Gen. 
    Motors, 111 Nev. at 1032
    , 900 P.2d at 349.
    In particular, although the district court generally stated at
    the hearing on the motion to set aside the MOU that certain facts were
    known to the parties at the time they entered into the agreement, nothing
    in the record indicates that the court considered Mark's contentions
    regarding his and Sophia's understanding of their respective rights as to
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    the Wilson property, and the effect of that understanding on their decision
    to execute the MOU. See 
    id. Thus, the
    district court erred by concluding
    the MOU was enforceable without properly addressing Mark's mutual
    mistake argument. Because determining the understanding of the parties
    when they entered into the MOU will require the resolution of factual
    issues, we also reverse those portions of the district court's orders that
    denied Mark's motion to set aside the MOU based on mutual mistake. See
    Ryan's Express, 128 Nev. at ,279 P.3d at 172.
    If the district court concludes that Cheryl is a necessary party,
    it may not be necessary for the court to revisit the mutual mistake and
    other related arguments. But if the district court finds Cheryl is not a
    necessary party, the court must address the mutual mistake and other
    contract defense arguments to determine whether Mark has demonstrated
    grounds under general contract law for setting aside the MOU. 5
    5 Ifthe court concludes that Cheryl was not a necessary party and
    that no contractual basis for setting aside the MOU exists, then Mark
    waived his argument that Cheryl should have been joined as a permissive
    party under NRCP 20 by entering into a binding settlement agreement
    that distributed the parties' interests in the Wilson property without
    seeking joinder of Cheryl. See McKellar v. McKellar, 
    110 Nev. 200
    , 202,
    
    871 P.2d 296
    , 297 (1994) (explaining that a waiver may be implied from
    "conduct which evidences an intention to waive a right, or by conduct
    which is inconsistent with any other intention than to waive a right"); see
    also Nev. Gold St Casinos, Inc. v. Am. Heritage, Inc., 
    121 Nev. 84
    , 89, 
    110 P.3d 481
    , 484 (2005) ("Waiver is generally a question of fact. But when
    the determination rests on the legal implications of essentially
    uncontested facts, then it may be determined as a matter of law."
    (citations omitted)). Thus, we do not address Mark's NRCP 20 arguments
    further in this opinion.
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    CONCLUSION
    Because the district court improperly determined that it did
    not have jurisdiction to join Cheryl to a divorce proceeding involving out-
    of-state property, we reverse the district court's denial of joinder and
    remand this matter to the district court for that court to consider whether
    Cheryl is a necessary party within the meaning of NRCP 19(a). If the
    court determines Cheryl is a necessary party under that rule, the court
    must then consider what interest, if any, Cheryl has in the Wilson
    property and must revisit the portions of the MOU relating to that
    property, as appropriate. If the district court does not find Cheryl to be a
    necessary party, then the court must consider Mark's mutual mistake and
    other contract arguments to determine whether the MOU must be set
    aside on a contract basis, and conduct any further proceedings as
    necessary. The parties do not challenge any other aspect of the divorce
    decree. As a result, we affirm the status of the parties as divorced.
    C.J.
    Gibbons
    We concur:
    Tao
    ir                     J
    J.
    Silver
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