OPINION
Pаgosa Oil and Gas and Sombrero Oil and Gas Company appeal a summary judgment in favor of Marrs and Smith Partnership and Rickey Smith. We find that Pa-gosa Oil and Gas lacks standing to sue and we dismiss its claim for lack of subject-matter jurisdiction. The remaining summary judgment is reversed and the cause remanded.
This case marks the third chapter of litigation involving the mineral development of the Frying Pan Ranch, which lies in parts of Loving, Winkler, and Andrews County, Texas, and Lea County, New Mexico.
See Marrs and Smith P’ship v. D.K. Boyd Oil & Gas Company, Inc.,
On August 1, 1999, D.K. Boyd Oil and Gas Co. leased mineral rights to property in Loving County from Marrs and Smith Partnership. 1 The term of the Boyd-Smith lease was one year, but provided Boyd with the option to extend the term for a second and third year, despite a lack of production, by paying additional bonus consideration to the partnership. Boyd tendered its first bonus payment in the amount of $38,144.58 on August 3, 1999.
On March 9, 2000, counsel for the Partnership wrote Boyd a letter indicating that the Partnership intended to rescind the lease. On March 16, 2000, Mr. Smith and the Partnership filed suit against Boyd seeking recision of the lease (“the prior lawsuit”). Boyd counter-claimed for tor-tious interference with a contract alleging, in part that the Partnership’s actions had interfered with the development of other mineral interests on the ranch. Boyd did not assert a counter-claim for breach of the lease.
Despite the ongoing lawsuit, Boyd tendered the second bonus payment for ex *209 tension of the lease on July 24, 2000. The Partnership returned the check on August 14, 2000, аnd again indicated its intent to rescind the lease. Again on July 21, 2001, Boyd tendered the bonus payment for the final extension period. That check was also returned by the Partnership. Final judgment in the prior lawsuit was issued on September 3, 2004.
In 2002, Pagosa Oil and Gas (“Pagosa”) and Sombrero Oil and Gas Company (“Sombrero”) agreed to participate in an oil and gas investment project, organized by Boyd, called the “Leiman Prospect.” In addition, on July 1, 2006, Boyd and Sombrero signed an agreement whereby Boyd assigned its potential breach of contract cause of action against the Partnership to Sombrero. Pagosa was not a party to the assignment.
Sombrero and Pagosa filed their original breach of contract petition against Mr. Smith and the Partnership for breach оf the Boyd-Smith lease on July 26, 2006. The petition alleged that the Partnership’s recision constituted breach of the lease. The amended petition also included an allegation that the Leiman Prospect participants were injured by the partnership’s actions because the recision caused delays in the drilling of an oil well, and the loss of numerous mineral leases for non-production.
Mr. Smith and the Partnership filed a joint motion for summary judgment on October 5, 2006, asserting traditional and no-evidence grounds. On October 31, 2006, Pagosa and Sombrero filed their summary judgment response and a cross-motion for partial summary judgment as to Mr. Smith and the Partnership’s liability for breach of the lease. The Partnership filed a response to the cross-motion and a supplement to its оriginal motion on March 2, 2007. This motion included a “jurisdictional plea” in which the Partnership challenged Pagosa and Sombrero’s standing to assert a claim for breach as they were not parties to the Boyd-Smith lease.
Mr. Smith filed an independent response to Sombrero and Pagosa’s cross-motion, and a reply to Sombrero and Pagosa’s response to the original summary judgment motion on March 14, 2007. Mr. Smith’s motion incorporated the Partnership’s jurisdiction and standing arguments. The trial court entered an order denying Sombrero and Pagosa’s motion for partial summary judgment, and granting summary judgment in favor of Mr. Smith and the Partnership. The order did not specify the grounds relied upon, and did not address Pagosa or Sombrero’s standing. Pagosa and Sombrero appeal.
Appellants raise two issues for our review. In Issue One, they challenge the summary judgment in favor of Mr. Smith and the Partnership. In Issue Two, they contend the trial court erred by denying their motion for partial summary judgment as to breach of contract liability.
As a preliminary matter, we must address Appellees’ assertion that Pa-gosa and Sombrero lack standing to maintain this lawsuit. In Texas, “standing” denotes the presence of a real controversy between the parties, that will actually be determined by the judicial declaration sought.
Austin Nursing Ctr., Inc. v. Lovato,
To establish its standing to assert a breach of contract cause of action, a party must prove its privity to the agreement, or that it is a third-party beneficiary.
OAIC Commercial Assets, L.L.C. v. Stonegate Village, L.P.,
The Partnership argues that because Pagosa and Sombrero were not parties to the Smith-Boyd lease, the entities do not have standing to assert the breach of contract cause of action. There is no dispute that Appellants were not parties to the original lease agreement. However, both argue that they have standing to assert the cause of action because they were participants, through Boyd, in an oil and gas exploration project called the “Leiman Prospect.” According to Appellants’ First Amended Original Petition and their response to the Partnership’s motion for summary judgment, the original dispute between Boyd and the Partnership caused a delay in drilling the Leiman Prospect’s first well. Because of the delay, the prospect lost numerous leases, which lead to monetary damages to all the participants.
Neither appellant argues that a contract existed between Leiman participants and the Partnership or Mr. Smith. 2 There are no allegations that Pagosa and Sombrero were intended to be third-party beneficiaries of the Boyd-Smith lease. Even if we assume that Appellants were harmed by the Partnership and Smith’s actions surrounding the Boyd-Smith lease, as is stated in Appellants’ pleadings, a judicial determination that the Boyd-Smith lease was breached would have no remedial effect on that harm. Therefore, to the extent Pago-sa and Sombrero depend on their status as Leiman participants for standing to sue for breach of contract they fail. Because its participation in the Leiman Prospect was Pagosa’s sole basis for standing, the trial court was without jurisdiction and Pago-sa’s claim must be dismissed.
Sombrero also asserts a sеcond alternative basis for its standing. In the summer of 2006, Sombrero and Boyd signed the following “Assignment and Transfer of Causes of Action.”
D.K. Boyd Oil and Gas Co., Inc. (“Boyd” or “Assignor”) for the consideration set forth below does hereby ASSIGN, GRANT, SELL and CONVEY unto SOMBRERO OIL & GAS COMPANY, L.L.C. (“Assignee”) the following:
All right title and interest in and to all causes of action that the Assignor has in any way related to the August 1, 1999 lease of minerals from Smith and Marrs Partnership to D.K. Boyd Oil and Gas Co., Inc .... (the “Lease”) including, but not limited to, all causes of action for the breach of the Lease by Marrs and Smith Partnership and Rickey Smith.
TO HAVE AND TO HOLD the above described rights and causes of action, together with, all and singular, the *211 rights and privileges thereto in any [way] belonging, unto the said Assignee, its successors and assigns forever.
As consideration for this assignment, Assignee shall remit to Assignor, within 30 days of recovery, 1/3 of the Assign- or’s pro ratа interest in any actual damage award, based on the Assignee’s pro rata interest in the Lease, minus actual out of pocket expenses incurred prosecuting the assigned causes of action.
Assignor agrees to cooperate and assist as necessary in prosecuting the assigned causes of action, including providing requested documentation and to execute such further documents as necessary to complete the assignment set forth above.
Assignor covenants that the rights, title and interest assigned herein have not been previously assigned or encumbered.
AGREED to be effective the 1st day of July, 2006.
Generally, this assignment would provide Sombrero with a basis for standing in the breach of contract suit.
See Stonegate Village, L.P.,
An “assignment” is simply a transfer of some right or interest.
See University of Texas Med. Branch at Galveston v. Allan,
The “anti-assignment” clause in the Boyd-Smith lease рrovided:
Lessor expressly reserves the right of approval of any and all assigning in whole or in part, the covenants hereof shall extend to their heirs, executors, administrators, successors, or assigns, and it is hereby agreed that in the event that this Lease shall be assigned as to a part or as to parts of the above described lands that Lessor shall receive a copy of such assignment, farmout, etc. within thirty (30) days of the effective date of same.
Appellees argue that this provision rendered any attempt by Boyd to assign any rights arising from the contract unenforceable without the Partnership’s consent. Therefore, Appellees conclude, Sombrero acquired no actionable interest from Boyd and has no standing to sue. As Sombrero points оut however, Texas law recognizes a distinction between a contracting party’s ability to assign rights under a contract containing an anti-assignment provision, and that same party’s ability to assign a cause of action arising from breach of that contract.
See State Farm Fire & Cas. Co. v. Gandy,
Appellees’ argument on this point is limited to the enforce ability and terms of the anti-assignment clause. They conclude that because an anti-assignment clause is generally enforceable, Boyd’s attempt to assign its cause of action was ineffective. This argument assumes that the clause is evidence of the parties’ intent to prevent both a contractual assignment, as well as a cause of action assignment. We do not agree it evidences such an intent.
When a written instrument is worded so that it can be given a definite meaning or interpretation, it will be interpreted as a matter of law.
SAS Institute, Inc. v. Breitenfeld,
However, Appellees argue this particular assignment should still be declared void because Sombrero, the assign-ee, is “an attorney-controlled entity.” In essence, Appellees argues that because one or mоre of Boyd’s former attorneys own interests in Sombrero, the assignment constitutes an unconscionable fee agreement and cannot be enforced. An “unconscionable” contract is an unenforceable contract.
See In re Poly-America, L.P.,
As discussed above, generally causes of action in Texas are freely assignable.
See Gandy,
Appellees fail to explain how this situation falls within one of these categories. They also fail to explain how the assignment between Boyd and Sombrero has so distorted the parties’ positions in the litigation that the circumstances warrant the creation of a new category of void assignments. Accordingly, the assignment is not void as a matter of law, and Sombrero has standing to assert Boyd’s breach of contract cause of action.
We now turn to the merits of the parties’ summary judgment motions. When both sides move for summary judgment, and the trial court grants one motion and denies the other, the reviewing court considers both sides’ summary judgment evidence and determines all issues presented.
Valence Operating Co. v. Dorsett,
The cross-motions in this case presented both traditional and no-evidence grounds for summary judgment.
See
Tex.R.Civ.P. 166a(c) and 166a(i). An appellate court reviews summary judgment
de novo. Provident Life & Accident Ins. Co. v. Knott,
Sombrero sued Appellees for breach of contract based on its position as assignee of Boyd’s cause of action for breach of the lease. The elements of a claim for breach of contract are: (1) the existence of a valid contract; (2) performance or tendered performance by the claimant; (3) breach of the contract by the defendant; and (4) damages to the plaintiff resulting from that breach.
Abraxas Petroleum Corp. v. Hamburg,
*214 In the first half of Issue One, Sombrero challenges Appellees’ no-evidence grounds regarding its breach of contract cause of action. All of Appellees’ no-evidence arguments are based on Appel-lees’ assertion that Sombrero was not a party to the original lease, and did not acquire anything by the assignment from Boyd. Appellees focus their no-evidence arguments on the premise that Sombrero was a stranger to the lease agreement, and therefore cannot provide evidentiary support for its claim. As we discussed in our analysis of Sombrero’s standing, Sombrero stepped into Boyd’s position regarding the claim for breach. See Allan, 777 S.W.2d at 453. The proper summary judgment inquiry revolves around Boyd’s relationship to the lease, and Boyd’s performance and damages. Sombrero’s summary judgment response included evidence focused precisely on those issues. Specifically, Sombrero produced evidence of the original Boyd-Smith lease, evidence of Boyd’s tender of bonus payments to Appellees in 1999, 2000, and 2001, and evidence of Ap-pellees’ attempted repudiation and recision. 3 We conclude, having reviewed the evidence in a light most favorable to the non-movant, the proffered evidence satisfied Sombrero’s burden in response to the no-evidence motion. Therefore, summary judgment was not properly granted on Ap-pellees’ no-evidence grounds.
The scope of re-view for a traditional summary judgment is well established.
See
Tex.R.Civ.P. 166a(c);
Nixon v. Mr. Prop. Mgmt. Co., Inc.,
In Issue Two, Sombrero contends the trial court erred by not granting its partial motion for summary judgment. In its cross-motion, Sombrero argued it was entitled to judgment as a matter of law as to Appellees’ liability for breach. To establish liability for breach of contract it was Sombrero’s burden to establish as a matter of law: (1) the existence of a valid contract; (2) performance or tendered performance by the claimant; (3) breach of the contract by the defendant; and (4) damages to the plaintiff resulting from
*215
that breach.
Homburg,
The final element in a breach of contract cause of action includes a causation requirement. See
Prudential See., Inc. v. Haugland,
In the second half of Issue One, Sombrero addresses Appellees’ affirmative defenses. Appellees jointly moved for summary judgment on the affirmative defenses of res judicata and limitations. Smith independently moved for summary judgment on the following additional defenses: release, collateral estoppel, one satisfaction rule, election of remedies, judicial еstoppel, impossibility of performance, and failure of consideration.
A defendant is entitled to summary judgment on an affirmative defense when the party conclusively establishes each element of the defense asserted.
See Ryland Group, Inc. v. Hood,
We will begin with Appellees’ joint defenses;
res judicata
and limitations.
Res judicata
is an affirmative defense. Tex.R.Civ.P. 94. The party claiming the defense must prove: (1) a prior final judgment on the merits by a court of competent jurisdiction; (2) the identify of the parties or those in privy with them; and (3) a second action based on the same claims as were or could have been raised in the first action.
In re K.S.,
Sombrero is in privity with Boyd by assignment, and Boyd was party in the prior suit. There is no dispute that a final judgment was rendered in the prior action. Finally, in the face of the Partnership’s attempted recision and repudiation, Boyd could have asserted a counterclaim in the prior case for breach of contract.
See Ingersoll-Rand Co. v. Valero Energy Corp.,
However, as Sombrero argues,
res judicata
does not bar a former defendant from asserting a claim in a later action that could have beеn filed as a counter-claim in the first suit, unless the claim was compulsory in the earlier action.
See Ingersoll-Rand, Co.,
Sombrero argues that this breach of contract claim was not a compulsory countei'-claim because it was not mature at the time of the prior litigation. A claim is mature when it has accrued.
Id.
at 208-10. In the case of a continuing contract, the limitations period begins to run at the earlier of the following events: (1) when the obligations are completed; (2) when the contract is terminated according to its terms; or (3) when the contract is anticipatorily repudiated by one party, and the repudiation is adopted by the other party.
Hubble v. Lone Star Contracting Corp.,
The summary judgment evidence establishes that the Partnership attempted to repudiate the lease in early 2000. In response, Boyd chose to continue to honor the lease by tendering its annual bonus payments over the next two years. Boyd retained its right to accept the repudiation and sue on the contract during that period.
See Scott,
Appellees’ limitations defense fails for similar reasons. To establish a limitations defense, a defendant must conclusively prove: (1) when the cause of action accrued; and (2) negate the discovery rule, if it applies and has been plead.
See KPMG Peat Marwick v. Harrison County Housing Finance Corp.,
As we discussed above, this breach of contract cause of action accrued on August 1, 2002. Sombrero filеd its original petition in this case on July 26, 2006, within the limitations period. Without addressing Boyd’s ability to continue to tender its performance despite the attempted repudiation, Appellees argue that Boyd’s breach of contract cause of action accrued no later than August 1, 2000. This date, according to Appellees, was the final deadline for Smith’s performance as it was the final opportunity for Smith to retract its repudiation prior to the first lease bonus payment. They argue that Boyd did not have the option to continue its own performance until the lease expired on August 1, 2002, because “time is of the essence” in an oil and gas lease. While we agree generally with this statement of law, 6 we are unaware of Texas authority holding that a limitations period is affected by a contract’s classification as such. Appellees have failed to cite any authority indicating that Boyd’s option to immediately treat the repudiation as a breach, or to wait for the lease’s termination, was affected by the fact that time is of the essence in the oil and gas context. Because Appellees failed to establish their right to summary judgment on their limitations defense, the defense was not a proper ground for summary judgment.
Mr. Smith also raised several additional affirmative defenses in his independent summary motion and response. Three of these defenses; release, collateral estoppel, and the one satisfaction rule are all dependant on the success of Appеllees’ argument that the prior lawsuit necessarily included litigation of all issues surrounding the Partnership’s attempted repudiation, including any claims for breach of contract. Given our conclusion in the discussion of Appellees’ res judicata defense, that the breach of contract cause of action was not precluded by the prior suit, Mr. Smith is not entitled to summary judgment on these additional defenses.
Mr. Smith’s motion also included the affirmative defense known as “election of remedies.” This defense bars recovery when a party successfully exercises an informed choice between two or more remedies, rights, or states of facts which are so inconsistent as to constitute a manifest injustice.
See Bocanegra v. Aetna Life Ins. Co.,
According to Mr. Smith’s motion:
*218 It is undisputed that [Boyd] was successful in the Prior Litigation on the tortious interference claim. [Boyd] had the option, in the Prior Litigation, to sue for various causes of action, including breach of contract. [Boyd] elected to pursue a tortious interference claim rather than a breach of contract claim. Allowing [Sombrero] to bring a breach of contract claim that is inconsistent with the Prior Litigation would be manifestly unjust to [Appellees]. [Appellees] changed their position, by leasing their minerals to a third party after the Lease expired, based on the fact that all causes of action related to the alleged repudiation had been litigated in the Prior Litigation. 7
To establish a right to this defense, Mr. Smith hаd to establish, as a matter of law, that Boyd’s decision to pursue a tortious interference claim in the prior lawsuit was inconsistent with the breach of contract claim now asserted.
See Bocanegra,
It is important to recognize these two types of claims accrue in significantly different contexts. A claim for tor-tious interference is asserted by a plaintiff whose contractual rights have been interfered with by a stranger to the contract; a third party.
See Butnaru, v. Ford Motor Co.,
Mr. Smith also asserted the doctrine of judicial estoppel as a bar to Sombrero’s claim. Judicial estoppel precludes a party from adopting a position inconsistent with one that was successfully maintained in an earlier proceeding.
Pleasant Glade Assembly of God v. Schubert,
In support of this defense, Mr. Smith presents a twenty-seven page excerpt from Mr. D.K. Boyd’s testimony in the prior lawsuit. In the section provided, Mr. Boyd discusses the terms of the more than 200 leases he obtained in his endeavors to develop the mineral reserves of the Frying Pan Ranch. Mr. Boyd also explains how *219 the Partnership’s refusal to consent to an assignment of thе lease forced Boyd to renegotiate an independent farmout agreement, specific to the Boyd-Smith lease, while 233 other leases were subject to a second farmout and an assignment to a third entity.
Mr. Smith fails to explain how Mr. Boyd’s testimony is inconsistent with the position Sombrero now asserts. As the movant on this affirmative defense, it was Mr. Smith’s burden to establish his right to the defense as a matter of law.
See Hood,
In a section of his summary judgment motion and response titled “failure of contract and failure of consideration,” Mr. Smith concludes that because the second and third lease bonus payments tendered by Boyd were returned, there was no consideration to support the lease extensions. A failure of consideration occurs when the plaintiff fails to perform a condition precedent to the defendant’s duty to perform.
See Nat’l Bank of Commerce v. Williams,
Mr. Smith admits that Boyd tendered the lease bonus payments. Those tenders constituted a detriment to Boyd, and therefore satisfy the definition of consideration. See id. at 571. The Partnership’s decision to refuse the payments did not simultaneously create a claim for breach and a defense to that claim by depriving thе contract of consideration. The evidence established the presence of consideration to support the second and third extensions. The fact that the Partnership chose not to accept that consideration, does not establish a failure of consideration defense.
In another section of his summary judgment response titled “impossibility of performance,” Mr. Smith states:
[Sombrero] [has] not produced any evidence to show that they were ready willing, and able to drill the Section 27 well in the spring of 2002. Smith has discovered that there were other mineral interests that were not leased as such time and such mineral interest constituted a far greater percentage of the mineral estate than that of [the Partnership],
Mr. Smith has failed to рrovide, or cite to, any evidence in the summary judgment record which would support his conclusion that Boyd was unable to perform its obligations under the lease. As the movant on this affirmative defense, it was Mr. Smith’s burden to establish his right to the defense as a matter of law.
See Hood,
We have determined that Pagosa Oil & Gas Company lacks standing to assert a breach of contract claim in this instance and its claim must be dismissed. Having reviewed the cross-motions for summary judgment, we have concluded: (1) that Ap-pellees are not entitled to a no-evidence summary judgment on the breach of con *220 tract cause of action; (2) that Appellant Sombrero did not satisfy its traditional summary judgment burden regarding its claim for breach of contract; and (3) that Appellees were not successful in establishing any of their affirmative defenses as a matter of law. Therefore, we reverse and remand the case for trial on the merits.
Notes
. Appellee Rickey Smith, is the general partner of Marrs and Smith Partnership. When it is necessary to refer to Rickey Smith individually in this opinion, we will refer to him as "Mr. Smith.” Mr. Smith and the Partnership will be referred to jointly as "Appellees.” We will refer to D.K. Boyd Oil and Gas Company and other entities owned or controlled by Mr. D.K. Boyd, collectively as "Boyd.” We will refer to the August 1, 1999 mineral lease as the "Boyd-Smith” lease. For a more detailed explanation of the parties and their relationships
see Marrs and Smith P'ship v. D.K. Boyd Oil & Gas Company, Inc.,
. According to Appellants’ summary judgment response, the property covered by the Boyd-Smith lease was not originally part of the prospect. The property only became available for drilling when the mineral rights came into the Leiman Prospect after it was released to another company.
. We decline to address Appellees’ argument that Boyd failed to perform because the bonus payments were paid via check rather than "in the coin of the realm.” This argument was not presented to the trial court, and has not been preserved for our review. See Tex.R.App.P. 33.1(a).
. In addition, the Texas Rules of Civil Procedure 166a(a) specifies that partial summary judgments are to be granted in circumstances where a fact issue remains regarding the "amount of damages.” When, as in this case, the summary judgment movant has not addressed whether there was damage as the result of a breach, the remaining issue is not limited to the amount of damage, and partial summary judgement would be improper. In this way, the rule distinguishes between whether an individual is damaged, for liability purposes, and the amount of monetary damages which should be awarded.
. The Partnership filed the prior lawsuit on February 9, 2000.
See Boyd Oil & Gas Co.,
. See Amber Oil & Gas Co. v. Bratton,
. The only summary judgment evidence specifically referenced in this passage is a July 2, 2004, mineral lease between the Partnership and a lessee identified as Chalfant Properties, Inc.
