What to Do If Your Ex Tries to Contest a Divorce Agreement

I’m Tim Blankenship of Divorce661. If you’ve signed a divorce agreement and thought the paperwork finally meant closure, you’re not alone—many people are surprised when an ex tries to challenge that agreement later. In this article I’ll walk you through what the law generally says, which parts of a divorce can and can’t be changed after the judgment, practical steps to protect yourself, and how to respond if your ex files a motion or threatens to contest the terms.

Why a signed divorce agreement matters

Once both parties sign a divorce agreement and the court approves it, it becomes a legally binding judgment. That judgment is meant to provide finality—closure and a clean break. Changing that judgment isn’t easy. Courts won’t undo a finalized agreement without a valid legal reason.

“A divorce agreement signed by both parties and approved by the court becomes a legally binding judgment.”

Which divorce terms can and can’t be modified after judgment

Not all parts of a divorce are treated the same when it comes to post-judgment changes. Here’s a quick breakdown:

• Child custody and visitation — Modifiable if there is a significant change in circumstances affecting the child’s best interests.
• Child support — Can be modified when income, employment, health, or other relevant circumstances change substantially.
• Spousal support (alimony) — May be changed under certain statutory or contractual terms, or when circumstances change significantly.
• Property division — Generally final and very difficult to reopen. Courts are reluctant to disturb the distribution of property after judgment, absent fraud, mistake, or similar narrow grounds.

Why property division is usually final

Property division is intended to be settled once and for all at the time of divorce. Because property rights are allotted in the judgment, courts require a high showing—such as fraud, duress, undisclosed assets, or clear clerical errors—to unwind those decisions. If your ex later complains the split was “unfair,” they’ll usually face a steep uphill battle.

First things to do if your ex contests the agreement

If your ex threatens to contest or actually files a post-judgment motion, take immediate, practical steps to protect yourself and your judgment:

1. Review the judgment carefully. Read the signed agreement and the court’s judgment line by line. Confirm what was ordered, any reservation of jurisdiction, and whether modification clauses were included.
2. Confirm voluntariness and absence of fraud. Check that signatures are valid and that there was no fraud, duress, or misrepresentation at the time of signing. Claims of unfairness require proof—mere buyer’s remorse is not enough.
3. Gather documentation. Collect income records, correspondence, the original settlement documents, and any evidence that supports the fact there has been no significant change in circumstances (if that’s your position).
4. Respond appropriately to motions or threats. If a motion is filed, you’ll need to file a response and possibly appear in court. Even informal threats should be taken seriously—consult an attorney so you don’t inadvertently make admissions or miss deadlines.
5. Consider enforcement tools. If your ex refuses to comply with the judgment, courts can enforce orders by contempt proceedings, wage garnishment, liens, or attorney-fee awards. The right tool depends on the violation and the jurisdiction.

How courts evaluate claims that an agreement was unfair or involuntary

When someone says a divorce agreement was unfair or that they didn’t understand it, courts look for objective evidence. Typical factors the court will consider include:

• Whether both parties had independent counsel or knowingly waived counsel
• Whether full disclosure of assets and income occurred
• Whether any threats, coercion, or duress were present when the agreement was signed
• Whether a clerical error, fraud, or mistake can be proven

Proving these issues is often difficult. Courts prefer finality and will usually uphold a clear, voluntary agreement unless compelling evidence says otherwise.

A real client example

We recently had a client whose ex tried to back out of a spousal support agreement about a year after the divorce was finalized. The judgment was clear, and there had been no significant change in circumstances. The court denied the ex’s request and we helped our client enforce the original order. That’s a common outcome when the judgment speaks plainly and there’s no legal ground to reopen it.

How I can help

At Divorce661 we help people review their divorce judgments, prepare responses to post-judgment motions, and enforce the terms of their agreements. Typical services include:

• Judgment and agreement review to identify exposure and enforcement options
• Drafting responses to motions and representing you in court when necessary
• Helping you gather the right evidence to defend the judgment or pursue enforcement
• Explaining what counts as a “significant change in circumstances” for child support, custody, or spousal support

If your ex is contesting your divorce agreement, don’t get pulled back into unnecessary conflict. A quick review of your judgment can clarify your rights and show the best path forward.

Conclusion

A signed and court-approved divorce agreement is powerful—it’s meant to be final. Child custody, child support, and spousal support can sometimes be modified if circumstances change, but property division is typically final and hard to undo. If your ex challenges the judgment, review the agreement, gather evidence, and respond promptly. If you need help, schedule a consultation at Divorce661.com and we’ll review your judgment and help you respond with confidence so you can move forward without reopening old wounds.