OPINION
Opinion by
MGA Insurаnce Company appeals from a summary judgment that it take nothing against Charles R. Chesnutt, P.C. and Charles R. Chesnutt. In one issue, MGA asserts the trial court erred in granting *811 appellees’ motion for summary judgment. For the reasons that follow, we reverse and remand to the trial court for further proceedings.
I. BACKGROUND
Underlying Lawsuit
In 1989, Vernon and Bonnie Johnson established a trust for their daughter Chelsea, and asked their friend, Charles Chesnutt, to serve as trustee. Chesnutt delegated the authority to make investment deсisions for the trust to Vernon Johnson. Bonnie and Vernon Johnson were subsequently divorced. After the divorce, Bonnie Johnson discovered that the value of the trust had declined so she hired an attorney to evaluate whether she had a cause of action against Chesnutt, and hired a second attorney to file suit against Ches-nutt. 1 MGA Insurance Company (MGA) provided a defense for Chesnutt in the Johnson litigation under a malpractice insurance policy issued to Chesnutt, P.C. During the course of the Johnson litigation, Chesnutt’s attorney filed several motions to compel discovery, a motion for sanctions, and a motion for summary judgment. Hearings were conducted on Ches-nutt’s motion to compel and alternative motion for sanctions. In January 2005, Bonnie Johnson nonsuited her claims against Chesnutt. Thereafter, Chesnutt filed a motion for contempt and amended motion for sanctions, seeking a dismissal of the Johnson litigation with prejudice, and monеtary sanctions against Bonnie Johnson and her counsel.
After a two day evidentiary hearing, the trial court made detailed findings of fact and conclusions of law and ordered a “death penalty” sanction and award of attorney’s fees against Johnson. On July 19, 2005, the trial court signed a judgment dismissing Johnson’s claims with prejudice and awarding Chesnutt his attorney’s fees and costs. Johnson appealed the sanctions award and deposited cash into the registry of the court in lieu of bond. On April 27, 2007, this Court affirmed the trial court’s judgment and upon denial of Johnson’s petition for review by the Supreme Court of Texas, the judgment became final. 2
Current Lawsuit
In April 2008, MGA notified Chesnutt that it asserted a contractual right to the sanctions award in the Johnson litigation because it paid Chesnutt’s attorney’s fees and costs of defense. After a year had passed, the money was still in the registry of the court so Chesnutt withdrew the money in April 2009. On October 7, 2009, MGA sued Charles R. Chesnutt, P.C., and Charles R. Chesnutt, individually, claiming assumpsit for money had and received, and seeking a declaratory judgment that it was entitled to the sanctions award received by Chesnutt in the Johnson litigation. Appellees filed original answers asserting various affirmative defenses, including res judicata, collateral estoppel, laches, limitations, and waiver, and argued “the judgment that forms the basis of this lawsuit cannot rationally be construed to support the claims of MGA.” Chesnutt, P.C.’s answer was verified by an affidavit from Chesnutt, stating thаt MGA’s suit was based upon the underlying Johnson judgment in favor of Chesnutt, individually, and not Chesnutt, P.C., and thus Chesnutt, P.C., was not a proper *812 party to the lawsuit and should be dismissed.
Appellees filed a motion for traditional summary judgment, asserting they were entitled to summary judgment because they: (1) negated the essential elements of MGA’s cause of action, (2) established each element of their affirmative defenses of res judicata, collateral estoppel, and collateral attack on the judgment, and (3) established that MGA’s suit in quasi-contract was barred due to the existence of a written contract between the parties. Appel-lees’ summary judgment evidence included the findings of fact and conclusions of law in the Johnson lawsuit, the insurance policy between MGA and Chesnutt, P.C., Chesnutt’s affidavit, MGA’s original petition with attachments, appellees’ answers, and a copy of the transcript of a hearing on appellees’ motion to transfer the current lawsuit from the 134th district court to the 101st district court, the trial court that signed the Johnson judgment. Appellant filed its response, and a sur-reply in response to appellees’ reply. On February 17, 2010, the trial court signed an order granting appellees’ motion for summary judgment. This appeal followed.
II. Standard of Review
The standard for reviewing a traditional motion for summary judgment is well-established.
See Sysco Food Servs., Inc. v. Trapnell,
When reviewing a summary judgment, we examine “the entire record in the light most favorable to the nonmovant, indulging every reasonable inference and resolving any doubts against the motion.”
Sudan v. Sudan,
III. Analysis
MGA’s sole issue on appeal is that the trial court erred in granting appellees’ motion for summary judgment. MGA details five sub-issues for our review, asserting: *813 (1) appellees failed to disprove one or more elements of MGA’s equitable claim for money had and received and unjust enrichment; (2) appellees failed to establish each element of their affirmative defenses of res judicata and collateral estoppel; (3) appel-lees failed to establish that MGA’s lawsuit is a collateral attack on the Johnson litigation judgment; (4) Chesnutt, P.C. failed to establish entitlement to summary judgment based on defenses arising out of the Johnson litigation because it was not a party to the Johnson litigation and not included in the Johnson judgment; and (5) genuine issues of material fact exist regarding MGA’s claim for money had and received and unjust enrichment, precluding summary judgment.
A. MGA’s Claim
Appellees’ motion for summary judgment attacked MGA’s claim for assumpsit for money had and received in two ways. First, appellees argued MGA did not have an ownership interest in the sanctions award because ownership, for purposes of assumpsit for money had and received, derives from a prior ownership of the funds in question. Appellees reasoned that because the sanctions award was paid by Johnson and not MGA, MGA was not the prior owner of the funds in question. Second, appellees asserted MGA was not entitled to recover in quasi-contract because there was a written contract that governed the relationship between the parties.
Assumpsit For Money Had And Received
According to legal historians, as-sumpsit was developed to redress circumstances involving unjust enrichment or an implied promise to pay what in good conscience defendant was bound to pay the plaintiff.
Tri-State Chem., Inc. v. Western Organics, Inc.,
A cause of action for money had and received is not premised on wrongdoing, but “looks only to the justice of the case and inquires whether the defendant has received money which rightfully belongs to another.”
Amoco,
*814
To prove a claim for money had and received, a plaintiff must show that a defendant holds money which in equity and good conscience belongs to him.
Edwards v. Mich-Continent Office Distrib., L.P.,
Appellees contend that assumpsit for money had and received is an action for restitution of money that was once owned in law and equity by a plaintiff. They argue MGA cannot establish it ever had an actual ownership interest in the sanction award. Further, appellees argue that because MGA made its payment tо the person that it intended to pay [Chesnutt’s attorney] and the amount of that payment was the amount that it intended to pay [Chesnutt’s attorney’s fees and costs], there is no action for assumpsit for money had and received because the payment was not made by mistake or under duress. Appellees also argue that there was never an implied promise on the part of Chesnutt to pay MGA any more than the $11,832 already paid MGA in order to purchasе malpractice insurance from MGA. Appel-lees did not cite to any summary judgment evidence in support of their arguments.
A recovery under assumpsit for money had and received does not “depend on the parties’ agreement or intent but rather the law’s presumption of a promise of compensation if one receiving another’s money would thereby be unjustly enriched.”
Amoco,
Quasi-Contract
Appellees’ motion for summary judgment attacked MGA’s equitable claim for assumpsit for money had and received on the basis that quasi-contractual relief was not available because the written contract between the parties addressed the obligations of the parties with respect to the subject matter of the dispute. In response, MGA argued the mere existence of a contract between the parties did not bar recovery in equity. MGA asserted that its claim against appellees was not a dispute regarding the scope or substance of the *815 insurance policy between the parties, and the insurance policy did not address or even contemplate the issue.
Generally, 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., 52
S.W.3d 671, 684 (Tex.2000);
McAfee, Inc. v. Agilysys, Inc.,
Appellees argued that MGA’s April 2008 demand letter “shows that the policy does indeed cover the same subject, because the demand letter demands the proceeds of the judgment and the letter is based upon the contract.” However, ap-pellees’ summary judgment evidence did not include an authenticated copy of the demand letter. Instead, appellees аttached a copy of MGA’s original petition, and the demand letter was an attachment to the original petition. Pleadings do not constitute summary judgment evidence.
Laidlaw Waste Sys. (Dallas), Inc. v. City of Wilmer,
Appellees’ summary judgment evidence also included Chesnutt’s affidavit in which he stated that after receiving MGA’s April 2008 demand letter, he researched the matter thoroughly and determined he was not obligated to deliver the award to MGA. Conclusory statements in affidavits are not proper summary judgment еvidence.
See Ritter v. Las Colonitas Condo.
Ass
’n,
B. Appellees’ Affirmative Defenses
In their motion for summary judgment, appellees also argued their summary judgment evidence conclusively established all elements of their affirmative defenses of res judicata, collateral estoppel, and collateral attack on the judgment.
Res Judicata
Appellees contended that MGA’s claim was barred by rеs judicata
*816
because the
Johnson
judgment established that Chesnutt was entitled to the sanction award of $114,777.50. Res judicata, also known as claim preclusion, prevents reliti-gation of claims that have been finally adjudicated, or that arise out of the same subject matter and could have been litigated in the prior action.
State & Cnty. Mut. Fire Ins. Co. v. Miller,
Appellees have not conclusively proved all the elements of res judicata. The
Johnson
judgment was rendered by a court оf competent jurisdiction. Both agree that MGA was not a party to the
Johnson
litigation; however, they disagree as to whether MGA was in privity with Chesnutt. “People can be in privity in at least three ways: (1) they can control an action even if they are not parties to it; (2) their interests can be represented by a party to the action; or (3) they can be successors in interest, deriving their claims through a party to the prior action.”
Am-stadt,
Further, MGA’s claims against appellees did not arise out of the same subject matter as the
Johnson
suit for legal malpractice against Chesnutt. Res judicata precludes a second action on claims that arise out of the same subject matter and which could have been litigated in the first suit.
See Amstadt,
Collateral Estoppel
Appellees argued that MGA was collaterally estopped from asserting a claim for money had and received because such claim was essentially an argument that Chesnutt was not entitled to the judgment in the
Johnson
litigation. Collateral estоppel, or issue preclusion, prevents the relitigation of identical issues of fact or law that were actually litigated and essential to the final judgment in a prior suit.
Texas Dep’t of Public Safety v. Petta,
MGA was not a party to the
Johnson
legal malpractice litigation against Chesnutt and did not have an opportunity to fully litigate whether it was entitled to be reimbursed from the sanctions awarded to Chesnutt in the
Johnson
judgment. MGA’s claim against appellees was not essential to the underlying suit and MGA and Chesnutt were not cast as adversaries in the underlying suit. Further, appellees failed to direct the trial court to any summary judgment evidence in support of their argument that MGA was collaterally estopped from asserting its claim fоr money had and received against appellees. We conclude appellees failed to establish the elements of their collateral estoppel affirmative defense.
See Petta,
Collateral Attack On A Judgment
In their motion for summary judgment, appellees asserted that MGA’s demand that the court determine that MGA is the owner of the sanctions award rather than Chesnutt is a collateral attack on the final judgment in the
Johnson
litigation. A collateral attack, as opposеd to a direct attack, does not attempt to secure a corrected judgment; rather it is an attempt to avoid the effect of a judgment “in a proceeding not instituted for the purpose of correcting, modifying, or vacating the judgment, but in order to obtain some specific relief which the judgment current
*818
ly stands as a bar against.”
Browning v. Prostok,
C. Affirmative Defenses of Chesnutt, P.C.
In sub-issue four, MGA asserts Ches-nutt, P.C. failed to establish entitlement to summary judgment based on defenses arising out of the
Johnson
litigation because it was not a party to the
Johnson
litigation and not included in the
Johnson
judgment. Although Chesnutt, P.C. filed a verified denial of liability because it was not a party to the
Johnson
litigation, it did not move for summary judgment on that basis. Rather, it asserted the same bases for summary judgment as those asserted by Chesnutt individually. With the exception of an attack on the legal sufficiency of Chesnutt P.C.’s grounds for summary judgment, MGA was required to present to the trial court any reasons seeking to avoid Chesnutt, P.C.’s entitlement to summary judgment, “such as those set out in rules 93 and 94” of the Texas Rules of Civil Procedure. Clear
Creek Basin Auth.,
IV. Conclusion
Because appellees failed to disprove at least one element of MGA’s claim as a matter of law and failed to conclusively establish all the elements of any of their affirmative defenses, we conclude appel-lees’ summary judgment was improperly granted. We reverse the trial court’s summary judgment and remand for further proceedings.
