delivered the opinion of the Court.
A judgment debtor is entitled to supersede the judgment while pursuing an appeal; this defers payment until the matter is resolved but does not halt the accumulation of interest on the judgment. If the debtor rejects the supersedeas option and does not otherwise suspend enforcement, the creditor may execute on the judgment by seizing bank accounts or other property. To avoid seizure, the debtor may pay the judgment outright, which stops the accumulation of post-judgment interest. But these alternatives to suspending enforcement put at risk the judgment debt- or’s ability to recoup the seized assets or payment when the appeal is successful. The judgment debtor in this case, under an agreement with the judgment creditor, made a payment toward satisfying the judgment and subsequently won the appeal. The question is whether the creditor may nevertheless keep the money because equitable principles of restitution do not apply. Because we reject the creditor’s approach, we affirm the court of appeals’ judgment.
I
Background
This case stems from Ronald Jensen’s breach of an option agreement with Dennis Miga, under which Miga would have been entitled to buy stock in a privately held corporation. The facts and the parties are well known to us.
See Miga v. Jensen (“Miga I”),
Despite the bond, postjudgment interest continued to mount. Shortly after the court of appeals’ decision, the parties entered into an agreed order under which Jensen made “an unconditional tender [to Miga] ... of the sum of $23,439,532.78 ... toward satisfaction of the Judgment in order to terminate the accrual of post-judgment interest on that sum.” Id. Jensen then filed a petition for review with this Court. Miga moved to dismiss Jensen’s petition, arguing that Jensen’s tender mooted the appeal. We rejected that argument. Id. at 212. We noted that, while “explicitly reserving the right to appeal when the judgment is paid would be the safe practice in these circumstances, ... payment on a judgment will not moot an appeal of that judgment if the judgment debtor clearly expresses an intent that he intends to exercise his right of appeal and appellate relief is not futile.” Id. at 211— 12. We observed that, in negotiating the order, Jensen discussed its anticipated jurisdictional effect with Miga and that “Jensen informed Miga that he believed the *101 Agreed Order would not moot his complaint, and that he would continue to pursue appellate review.”' . Id. at 212. Although “Miga ... complain[ed] that his refusal to accede to an express reservation of appeal in the agreed judgment and Jensen’s removal of that language [from an earlier draft] ma[de] the payment of the judgment misleading,” we disagreed:
While Miga may have believed that Jensen’s payment mooted the appeal, he could not have had any reasonable doubt that Jensen believed it did not, or that Jensen intended to pursue the appeal if legally allowed to do so. Consequently, because Jensen’s payment was coupled with an expressed intent to pursue his appeal, he did not waive his right to continue to contest the judgment.
Id.
On the merits, we held that Miga’s contract damages should have been measured by the value of the option at the time of breach, rather than at the time of trial. We reversed the court of appeals’ judgment on that issue and rendered judgment for Miga for $1,034,400. Id. at 217. Miga moved for rehearing, arguing, among other things, that “[i]f the Court somehow implicitly [held] that Miga has any potential repayment obligation, the Court should grant rehearing and correct that error.” The Court denied the motion without comment. On remand, the trial court rendered a modified judgment of $1,879,382.11 in Miga’s favor. The judgment stated that it addressed “the issues specifically directed in the mandate of the Texas Supreme Court ... and none other.” Accordingly, Jensen’s motion seeking to recover the lion’s share of the money he had previously paid Miga remained unresolved.
Jensen then sought restitution of $21,560,150.67, the difference between the amount paid to Miga — $23,439,532.78—and the amount owed under the modified judgment. When Miga refused to tender that amount, Jensen filed this suit. The trial court granted Jensen’s and denied Miga’s motion for summary judgment.
1
A divided court of appeals affirmed.
II
Restitution After Reversal
Restitution after reversal has long been the rule in Texas and elsewhere.
See, e.g., Bank of U.S. v. Bank of Wash.,
A. Does the parties’ contract preclude restitution?
Miga first argues that because the parties’ agreement made Jensen’s $23,439,532.78 tender “unconditional,” the restitution remedy is unavailable.
See
Restatement § 74 (requiring restitution upon reversal unless it “would be inequitable or the parties contract that payment is to be final”). While it is true that “when a valid, express contract covers the subject matter of the parties’ dispute, there can be no recovery under a quasi-contract theory,”
Fortune Prod. Co. v. Conoco, Inc.,
Many of the parties’ arguments here repeat those made last time the case was before us, and our prior opinion answers most of them. Miga contends that he and Jensen contracted for the payment to be final, but if that were so, we would not have held that Jensen’s appeal — despite the payment — was viable.
Miga I,
Miga argues that our decision in
Excess Underwriters at Lloyd’s, London v.
*103
Frank’s Casing Crew & Rental Tools, Inc.,
[Disputes between insurers and policyholders over the insurer’s duty to pay a claim, or to settle or defend a claim brought against the policyholder, present special difficulties for the law of restitution, because the insurer’s duty to indemnify and defend is subject to extensive regulation under local law.
Restatement (Third) § 35, cmt. c. (Tentative Draft No. 3, 2004). In addition, in
Frank’s Casing,
“the insurance policies spell[ed] out the parties’ respective obligations in great detail,”
Frank’s Casing,
B. Was Jensen’s payment voluntary?
Second, Miga argues that the voluntary payment rule precludes restitution. This common law principle provides that “money voluntarily paid on a claim of right, with full knowledge of all the facts, in the absence of fraud, duress, or compulsion, cannot be recovered back merely because the party at the time of payment was ignorant of or mistook the law as to his liability.”
Pennell v. United Ins. Co.,
The voluntary payment rule precludes a party from “pay[ing] out his money, leading the other party to act as though the matter were closed, and then be in the position to change his mind and invoke the aid of the courts to get it back.”
Peake,
In one of only two cases in which we have affirmatively applied the voluntary payment rule in the last forty years, we held that a services fee paid by community college students fell within the rule: “In light of the choices retained and [the students’] right to request a waiver of the fees or otherwise protest the imposition of the fee, any coercion that existed was not actual and imminent and did not constitute duress as a matter of law,” making the payment voluntary. Bolton, 185 S.W.Sd at 883. We recognized that certain financial incentives or disincentives, like the fee, do not “transform a choice into coercion.” Id.
In contrast, Jensen faced not only mounting post-judgment interest but the coercive power of the judgment. In
Highland Church of Christ v. Powell,
Nor is the restitution claim of the judgment debtor barred by the doctrine of “voluntary payment” if the debtor elects to pay a judgment that he or she regards as invalid, without waiting for the issuance or levy of execution. On the contrary, any payment made in response to a judgment is treated as a payment made under compulsion, at least for the purpose of permitting the judgment debtor to avoid the consequences that would flow from regarding the payment as “voluntary.”
Restatement (Third), § 18, cmt. c; see also id. ch, 2, Introductory Note (Tentative Draft No. 1, 2001) (referring to a payment made in compliance with a judgment as “[a] transferí ] made under legal compulsion”); Restatement § 74, cmt. b. (noting coercive effect of judgment).
The court of appeals held that the voluntary payment rule did not apply because “Jensen signed the Agreed Order under economic duress.”
C. Does Miga’s tax payment raise a fact issue on the equities of restitution?
Finally, Miga asserts that restitution would be inequitable because, believing the funds to be his, he paid $5 million in income taxes. See Restatement § 74 (requiring restitution upon reversal “unless restitution would be inequitable”). But Miga does not contend that restoring $5 million of the $21 million he received would be inequitable — he argues that restoring any of the money would be inequitable. In response to an interrogatory that asked whether Miga contended he should be excused from making restitution “of all or any part of the Payment on the grounds that [he] lack[ed] sufficient means to make restitution in full,” Miga answered:
No. Defendants contend that Plaintiffs claims are barred in their entirety by the express terms of the Rule 11 Agreement between Jensen and Dennis Miga, which provides that the sums Jensen seeks to recover were paid unconditionally to Dennis Miga.
Miga successfully resisted discovery of his net worth on the same basis, and still maintains that the tax payment is an absolute defense to a restitution claim.
Miga’s contention is incorrect. Restitution is rooted in principles of unjust enrichment. See Restatement § 1 (“A person who has been unjustly enriched at the expense of another is required to make restitution to the other.”); Restatement (Third) § 1 (Discussion Draft 2000) (“A person who is unjustly enriched at the expense of another is liable in restitution to the other.”). While the law of restitution recognizes a defense based on change of position, the defense generally applies only to the extent that restitution would cause loss to an innocent party, not the judgment creditor. See, e.g., Restatement § 142, cmt. f. (recognizing change of circumstances defense and providing that “[i]f part of the subject matter is lost or destroyed, the recipient still has a duty of making restitution of the remainder”); see also id. § 74, cmt. c. (providing “[n]or is change of position a defense to the creditor”).
Moreover, to assess equities, we must also consider Miga’s conduct. Miga’s tax obligation arose because he exercised control over Jensen’s $23,439,532.78 tender. Well aware that Jensen would continue his appellate fight to reverse the judgment, Miga could have opted to decline the payment and await the appellate outcome. Instead, Miga gambled on the strength of his appeal. Jensen’s ultimate success meant that the multimillion dollar trial court judgment was, in large part, erroneous. Prohibiting restitution would penalize Jensen for the court’s mistake and is inimical to the unjust enrichment principles underlying the doctrine. We can no more fault Jensen for his dogged pursuit of an appellate remedy than reward Miga for wagering on an affirmation of the judgment. ■ The trial court and the court of appeals correctly concluded that, as a matter of law, restitution comports with the equities.
Ill
Conclusion
We affirm the court of appeals’ judgment. Tex.R.App. P.60.2(a).
Notes
. Miga’s wife, Mary Patricia Miga, was a defendant in the trial court but has been dismissed by stipulation.
. We received amicus curiae briefs from Sharon E. Callaway, David M. Gunn, Deborah G. Hankinson, Shannon H. Ratliff, Robert M. “Randy” Roach, Jr., and Stephen G. Tipps, supporting parts of Miga’s petition for review; and from Professor Douglas Laycock and the Texas Association of Business, supporting Jensen’s response.
.The Restatement of the Law (Third), Restitution and Unjust Enrichment will replace the original Restatement of Restitution, promulgated in 1936. This draft has been tentatively approved by both the Council and the Mem *102 bership. See http://www.ali.org/index.cfm? fuseaction=projects.proj_ip&projectid=14 (last visited Oct. 21, 2009 and copy available in Clerk of Court's file).
