¶ 1 Dеan and Stacey Norcutt bought a home for cash and satisfied the existing first mortgage. They later discovered the home was also subject to a judgment lien far exceeding the property’s value. We hold that the purchasers were equitably subrogated to the mortgage lien’s priority for the amount they paid to satisfy the mortgage.
¶ 2 In September 2004, Sourcecorp, Inсorporated obtained a judgment exceeding $3 million against Steven and Rita Shill, who owned residential property in Prescott. The property was subject to a first mortgage in favor of Zions National Bank securing a debt of nearly $689,000. 1 Sourcecorp recorded a judgment lien. In November 2004, the Shills sold the property to the Norcutts for $667,500 in cash. Zions Bank accepted $621,000 of the proceeds in full satisfaction of the debt secured by its first mortgage. Although the Norcutts purchased title insurance from First American Title Insurance Company, the title insurer did not discover Sourceeorp’s judgment lien.
¶ 3 After the Norcutts bought the property, Sourcecorp initiated a sheriffs sale to foreclose on its judgment lien. The Norcutts sued to enjoin the sale. Granting relief, the trial court ruled that the Norcutts’ interest in the property was superior to Sourcecorp’s judgment lien. The court of appeals reversed for reasons not before this Court.
Sourcecorp, Inc. v. Shill,
No. 1 CA-CV 05-0425 (Ariz.App. Sept. 26, 2006) (mem. decision). On remand, the Norcutts argued that they were equitably subrogated to the position of Zions Bank in priority over Source-corp. The trial court rеjected this argument and entered summary judgment for Source-corp. Reversing again, the court of appeals held that the Norcutts were equitably subro-gated.
Sourcecorp, Inc. v. Norcutt,
¶ 4 We granted review because application of the equitable subrogation doctrine in this context is an issue of first impression and statewide importance. Jurisdiction exists under Article 6, Section 5(3) of the Arizona Constitution and A.R.S. § 12-120.24 (2009).
II.
¶ 5 Equitable subrogation is “the substitution of another person in the place of a creditor, so that the person in whose favor it is exercised succeeds to the rights of the creditor in relation to the debt.”
Mosher v. Conway,
¶ 6
Mosher
concerned “paving liens” on residential lots assessed for street improvements. Under the statutory scheme, the city could auction liens for delinquent assessments to private parties. If the property owner or a “рarty in interest” did not redeem the lien within a year, the purchaser would obtain the property free of encumbrances.
¶ 7
Mosher
said that “no general rule can be stated which will afford a test [for equitable subrogation] in all cases.”
Id.
at 468,
[A] mere volunteer, who has no rights to protect, may not claim the right of subro-gation, for one who, having no interest to protect, without any legal or moral obligation to pay, and without an agreement for subrogation or an assignment of the debt, pays the debt of another, is not entitled to subrogation, the payment in his case absolutely extinguishing the dеbt.
Id.
at 470,
¶
8
Because the Court declined to adopt a bright-line test in
Mosher
and has not revisited the issue, the court of appeals has developed guidelines for applying equitable subro-gation. In 1965, the court of appеals stated that subrogation would occur if (1) a third person discharges an encumbrance on the property of another; (2) the person is not a volunteer; and (3) there is an express or implied agreement “that he will be substituted in place of the holder of the encumbrance.”
Peterman-Donnelly Eng’rs & Contractors Corp. v. First Nat’l Bank of Ariz.,
¶ 9 Nearly forty years later, the court of appeals described several tests fоr equitable subrogation.
See Lamb Excavation, Inc. v. Chase Manhattan Mortg. Corp.,
¶ 10
Lamb Excavation
explained, however, that the Restatement has adopted a more expansive standard.
Id.
at 481 ¶ 10,
¶ 11 In
Lamb Excavation,
the court of appeals distinguished
Petermanr-Donnelly
from the “majority approach,”
¶ 12 There is thus some ambiguity in Arizona ease law regarding the test for equitable subrogation. For reasons explained below, we adopt the Restatement approach because it is most consistent with the rationale for equitable subrogation.
III.
¶ 13 Absent equitable subrogation, once the debt to Zions Bank was fully satisfied by the Norcutts, Sourceeorp’s judgment lien advanced in priority. Sourceeorp claims that it is entitled to execute on its $3 million judgment lien through a sheriffs sale. The Nor-eutts would receive nothing from such a sale, but would likely have a claim against their title insurer for failing to discover Souree-corp’s lien. In contrast, the Norсutts argue that they are subrogated to the position of Zions Bank and therefore have a priority over Sourcecorp’s judgment lien.
¶ 14 Relying on
Mosher
and other eases, Sourceeorp argues that equitable
A.
¶ 15
Mosher
and later eases state that a “mere volunteer” cannot claim equitable sub-rogation. But
Mosher
also explained that a person who pays a debt to protеct the person’s interests is not a volunteer.
¶ 16 We agree with the Restatement that equitable subrogation should not turn on whether the person invoking the doctrine is labeled a volunteer. “[T]he meaning of the term ‘volunteer’ is highly variable and uncertain, and has engendered considerable confusion.” Restatement § 7.6 emt. b. Instead, the Restatement appropriately focuses on other circumstances of the party seeking to invoke subrogation, including whether the party has ■ paid a preexisting obligation to protect the party’s interest in the property.
See
Restatement § 7.6;
see also Dietrich Indus., Inc. v. United States,
¶ 17 The Noreutts paid the preexisting debt to Zions Bank to protect their concurrently acquired interest in the property. The Noreutts thus had a sufficient interest to allow them to seek equitable subrogation.
Cf. Han v. United States,
B.
¶ 18 Quoting
Herberman v. Bergstrom,
Sourcecorp also argues that “[f]or equitable subrogation to apply, there must be an agreement ... thаt the subsequent lender will be substituted for the holder of the prior encumbrance.”
¶ 19
Mosher,
however, did not require an “agreement” in holding that the purchaser of paving liens was equitably subrogated to the positions of other lienholders.
See
¶ 20 The Restatement and case law from other jurisdictions do not require an agreement as a condition for equitable subrogation.
See
Restatement § 7.6 cmt. a;
Han,
¶21 We adopt the Restatement approach and reject any requirement of an “agreement” аs a condition for equitable subrogation. To be sure, parties may achieve subrogation by agreement, such as through an assignment of a promissory note and related mortgage. See Restatement § 7.6 emt. a (distinguishing “conventional subrogation” by assignment or agreement from equitable subrogation). Equitable subrogation, however, does not turn on contractual principles, but instead on the concern to prevent unjust enrichment. That goal is served by allowing subrogation when a party pays a mortgage to protect an interest in the property, irrespective of an express or implied agreement that the party will succeed to the position of the prior lienholder.
C.
¶ 22 Finally, Sourcecorp argues that because the Norсutts obtained title insurance from which they could recoup any losses, equitable considerations preclude subrogation. Sourcecorp contends that neither the Norcutts nor the insurer should benefit from the insurer’s negligence in failing to discover the recorded lien.
¶ 23 Accepting these arguments, however, would require us to ignore the key concern underlying equitablе subrogation and would unjustly enrich Sourcecorp. Before the Nor-cutts purchased the home, Sourcecorp had a second lien on the property, which was worth less than the outstanding mortgage debt of $689,000. The Norcutts satisfied the first lien by paying Zions Bank $621,000 in cash. Sourcecorp contends that the result — unintended by the Norcutts — was that Source-corp obtained a first liеn on property that had just sold for $667,500, and the Norcutts were left with nothing but a claim against their insurer.
¶ 24 Denying subrogation here, therefore, would give Sourcecorp a windfall independent of whether the Norcutts were insured or had constructive notice of the judgment lien. (There is no suggestion the Norcutts had actual notice of the lien, and we need not address whether a purchaser with actual notice could ever be equitably subrogated.) Moreover, there is no general requirement that a person seeking subrogation lack notice in order to obtain equitable relief. In
Lamb Excavation,
for example, the permanent lender was subrogated to a first lien position even though various subcontractors had served twenty-day notices of mechanics’ liens.
¶ 25 Sourcecorp further argues that subro-gation would prejudice its interests by preventing it from moving up in priority as a lienholder after the satisfaction of the mortgage debt to Zions Bank. “Subrogation will be recognized only if it will not materially prejudice the holders of intervening interests.” Restatement § 7.6 emt. e. We do not accept, however, that subrogation would materially prejudice Sourcecorp.
¶ 26 Generally, the satisfaction of a superi- or lien results in subordinate lienholders advancing in priority, but preventing this result in certain circumstances is precisely the aim of equitable subrogation. As the Restatement notes:
One who fully performs an obligation of another, secured by a mortgage, becomes by subrogation the owner of the obligation and the mortgage to the extent necessary to prevent unjust enrichment. Even though the performance would otherwise discharge the obligation and the mortgage,they are preserved and the mortgage retains its priority in the hands of the subro-gee.
Restatement § 7.6(a) (emphasis added). Thus, preventing a junior lienholder from advancing in priority is an intended consequence of equitable subrogation.
See Lamb Excavation,
¶27 Sourcecorp also argues that if the Norcutts are placed in the position of Zions Bank, they could eliminate Sourcecorp’s judgment lien by a collusive refinancing followed by a foreclosure by the new first mortgage holder.
Cf. Centreville Car Care, Inc. v. N. Am. Mortg. Co.,
¶ 28 In determining the extent to which the Norcutts are subrogated to the prior position of Zions Bank, we note that thеy are cash purchasers rather than creditors looking to the property to secure a debt. With respect to creditors, “[o]rdinarily one who is entitled to subrogation is permitted to enforce both the mortgage and the secured obligation.” Restatement § 7.6 cmt. a. Fee owners are in a different situation, because the merger doctrine generally holds that if they acquire a mortgage on their own property, the lien is extinguished because the lesser interest “merges” into the greater.
See Mid Kansas Fed. Sav. & Loan Ass’n v. Dynamic Dev. Corp.,
¶ 29 Recognizing that equitable subrogation depends on the facts of the particular case,
see Mosher,
IV.
¶ 30 For the reasons stated, we affirm the opinion of the court of apрeals and remand to the superior court for entry of summary judgment in favor of the Norcutts consistent with this opinion. We deny the requests for attorneys’ fees.
Notes
. Zions Bank held a deed of trust, but we refer to this interest as a “mortgage" because Source-corp and the opinion of the court of appeals use this term. The distinction between a mortgage and a deed of trust is immaterial to our analysis. Cf. Restatement (Third) of Property: Mortgages § 1.1 (1997) (defining "mortgage” to include deeds of trust).
