You can undo a mediated settlement agreement in Texas only by proving a specific legal defect: the agreement failed the Family Code’s formatting and signature rules, the other side committed fraud, you signed under genuine duress, or, in a case involving children, a narrow family-violence exception applies. Setting aside a mediated settlement agreement in Texas is not about convincing a judge the deal was unfair. The statute forecloses that argument. And once a final judgment is entered on the MSA, you may have as little as 30 days to act.
Why Texas MSAs Are So Hard to Undo
Two Family Code sections do the heavy lifting. Section 6.602 governs MSAs in divorce and property cases. Section 153.0071 covers MSAs in suits affecting the parent-child relationship. Both say that once an MSA meets the statutory requirements, a party “is entitled to judgment on the mediated settlement agreement notwithstanding Rule 11, Texas Rules of Civil Procedure, or another rule of law.”1State of Texas. Texas Family Code Section 6-602 – Mediation Procedures That phrase, “another rule of law,” is what gives these agreements their force. The trial court’s job is to render judgment on the terms, not to weigh whether the deal was wise.
Even mutual regret won’t help. If both spouses sign a compliant MSA and later agree they want to tear it up and start over, Texas courts have held they cannot. The “not subject to revocation” language is a one-way door. And unfairness, standing alone, is not a ground. The Texas Supreme Court held in Milner v. Milner that when an MSA meets the statutory requirements, “the trial court will not go behind the signed agreement to evaluate its merits but must render judgment on the parties’ agreement.” Appellate courts have described unfairness challenges as “foreclosed by the legislature.”2Justia. Texas Third Court of Appeals, Case No. 03-11-00795-CV A lopsided split of property is enforceable if it was voluntarily signed in a compliant MSA.
Grounds a Texas Court Will Consider
The MSA Fails the Statutory Requirements
This is the cleanest attack. Under both Sections 6.602 and 153.0071, an MSA is binding only if it includes a prominently displayed statement (in bold, capitals, or underlined text) that it is “not subject to revocation,” is signed by each party, and is signed by each party’s attorney who was present when the agreement was signed.3State of Texas. Texas Family Code Section 153-0071 – Alternate Dispute Resolution Procedures If the irrevocability language is buried in fine print, or an attorney who was present failed to sign, the agreement doesn’t trigger the statute’s binding effect. Without that statutory protection, it can be treated like any other contract rather than an automatic judgment.
Fraud
Fraud is the most commonly argued substantive ground. You need to show the other party deliberately misrepresented or concealed a material fact and that you relied on the false picture when you agreed to the terms. The classic scenario is hidden assets: a concealed brokerage account, an undervalued business, a property interest kept off the inventory. Careless mistakes and aggressive negotiating are not fraud. A bank account that was genuinely overlooked is not fraud. A bank account deliberately hidden during discovery is.
Duress or Coercion
Duress requires proof of an improper threat so severe you had no realistic choice but to sign. Threats of physical harm qualify. So can threats of financial destruction designed to overwhelm your ability to negotiate. The ordinary pressure of a long mediation, frustration with the process, or feeling rushed by your own attorney does not. Courts see these claims often and are skeptical. The coercion must come from something outside the normal give-and-take of negotiation.
The Family Violence Exception (Child Cases Only)
Section 153.0071 contains a narrow exception for MSAs involving children. A court may decline to enter judgment, but only if it finds both: that a party was a victim of family violence that impaired the party’s ability to make decisions, or that the agreement would give a registered sex offender or someone with a history of abuse unsupervised access to the child; and that the agreement is not in the child’s best interest.3State of Texas. Texas Family Code Section 153-0071 – Alternate Dispute Resolution Procedures Both prongs are required. Proving family violence is not enough if the court still finds the custody terms serve the child’s best interest.
This exception applies only to parent-child relationship MSAs. Section 6.602, which covers divorce property division, has no equivalent carve-out. If your only complaint is about how property was split, the family-violence exception is not available; you’d need to rely on fraud, duress, or a statutory defect.
Deadlines That Control Your Window
Before the Court Enters Judgment
If the court has not yet signed a final decree incorporating the MSA, you have the strongest position. File your motion while the case is pending, and the court has broad authority to consider it. This is the window where statutory-defect, fraud, and duress challenges are most viable. The other party can move for entry of judgment at any time, so delay works against you.
After the Court Signs the Judgment
Once a final judgment is signed, the clock runs fast. Under Texas Rule of Civil Procedure 329b, you generally have 30 days after the judgment is signed to file a motion for new trial or motion to vacate. The trial court keeps the power to grant relief for 30 days after judgment, and a timely motion extends that power until 30 days after the motion is overruled. If the court doesn’t rule within 75 days of the judgment, the motion is overruled by operation of law. Miss these deadlines and the trial court loses jurisdiction to help you.
After the Court’s Plenary Power Expires
Your remaining option is a bill of review, an independent lawsuit asking to set aside the judgment. You must prove a meritorious defense to the original claims, that you were prevented from presenting it by the other party’s fraud or wrongful conduct, and that your own negligence did not contribute to the situation. Courts grant bills of review rarely.
Evidence You Will Need
Your own testimony is not enough. Judges expect documentation, and what you need depends on the ground you’re pursuing.
For a statutory-defect claim, the MSA itself is the primary exhibit. The document either contains the required irrevocability language in prominent formatting and bears all required signatures, or it doesn’t. The evidence is on the face of the agreement.
For fraud, you need proof of deliberate concealment or misrepresentation:
- Bank statements, brokerage records, or property deeds the other party hid during negotiations.
- Emails, texts, or recordings in which the other party discussed concealing assets or lying about their value.
- A forensic accountant or financial expert who can trace hidden assets or show that disclosed valuations were false.
- Testimony from anyone with direct knowledge of the concealed information, such as a business partner or family member.
For duress, the strongest proof is threatening messages, voicemails, or emails from the other party. Testimony from someone who witnessed the coercive behavior, whether the mediator, your attorney, or another person present, can support the claim.
For the family-violence exception, police reports, protective orders, medical records documenting injuries, and testimony from counselors or family members who can describe the pattern of violence and its effect on your ability to negotiate all carry weight.
How to File the Motion
You start by filing a Motion to Set Aside the Mediated Settlement Agreement with the district clerk in the county where your case is pending. The motion should identify the specific legal grounds, explain the factual basis for each, and reference the supporting evidence. A filing fee applies, and the amount varies by county; the clerk’s office can confirm the current figure.
Filing alone is not enough. You must serve the other party and their attorney so they have notice and a chance to respond. The court will set an evidentiary hearing where both sides can present testimony, cross-examine witnesses, and submit documents. The judge then decides whether the evidence meets the legal standard.
If the court grants the motion, the MSA is voided and the family law case resumes as though the agreement never existed. Property division, custody, and support go back to square one, to be resolved through further negotiation, a new mediation, or trial. Setting aside an MSA does not end the case. It reopens it.
What It Can Cost You If You Lose
Filing carries real financial risk beyond your own attorney fees. If the court finds your motion lacked a reasonable legal or factual basis, it can impose sanctions. Under Texas Civil Practice and Remedies Code Section 10.002, the court may award the other party the reasonable expenses and attorney fees they incurred fighting the motion. If the court finds you showed no due diligence, it can go further and award all costs for inconvenience, harassment, and out-of-pocket expenses caused by the litigation.4State of Texas. Texas Civil Practice and Remedies Code 10-002
A motion built on general dissatisfaction with the deal, without evidence of fraud, duress, or a statutory defect, is exactly the kind of filing that invites sanctions. If you have genuine evidence of a recognized defect, the motion is worth pursuing. If your real grievance is that you agreed to bad terms under the ordinary stress of mediation, the motion will likely fail and may cost you more than the terms you’re trying to escape.
Heading Off the Problem Before Mediation
Both Sections 6.602 and 153.0071 let a party file a written objection to a referral to mediation on the basis of family violence. Once filed, the case cannot be sent to mediation unless the other party requests a hearing and the court finds the evidence does not support the claim.1State of Texas. Texas Family Code Section 6-602 – Mediation Procedures If the court still orders mediation over the objection, it must put safety measures in place, including keeping the parties in separate rooms with no face-to-face contact. Raising the issue before mediation is far easier than trying to undo an MSA after the fact.