A case can be reopened after settlement, but only in narrow circumstances and usually within a tight deadline. Courts treat a signed settlement almost like a final judgment, so you cannot undo it because you got a bad deal or later wished you had held out for more. You need to show the agreement itself was fundamentally defective — the other side lied about something material, you were coerced into signing, both sides shared a mistaken belief about a key fact, or the terms were so lopsided that no reasonable person would have agreed. And in most federal cases, you have one year from the judgment to file.
The One-Year Clock and How Rule 60(b) Works
When a settlement ended your lawsuit through a court order or dismissal, the tool for attacking it is Federal Rule of Civil Procedure 60(b), which lets a court relieve a party from a final judgment. State courts have parallel rules that generally track the federal version.1Legal Information Institute. Federal Rules of Civil Procedure Rule 60 – Relief from a Judgment or Order
Three of the six grounds listed in Rule 60(b) do the real work in settlement disputes: mistake or excusable neglect, newly discovered evidence, and fraud or misconduct by the other party. Motions on any of these three must be filed within one year of the judgment. Every Rule 60(b) motion also has to be filed within a “reasonable time,” which courts read skeptically — waiting without a strong justification will sink the motion on its own.
There is a catchall provision for “any other reason justifying relief,” and it has no fixed one-year cap. But the Supreme Court requires “extraordinary circumstances” to use it, and it exists mostly for situations the specific grounds don’t reach. It is not a workaround for missing the one-year deadline on a garden-variety fraud or mistake claim.
State rules on workers’ compensation reopening are set separately and can run much longer, from a few years to well beyond, depending on the state and the benefit at issue.
What You Have to Prove
Fitting into a Rule 60(b) category is only the frame. You still have to show the settlement itself was defective under one of the contract doctrines courts recognize.
Fraud or Misrepresentation
Fraud is the most common ground and the strongest when you can prove it. You need to show the other side intentionally lied about or hid a material fact, and that you reasonably relied on the false information when deciding to settle. In a personal injury case, this could look like a defendant’s insurer withholding medical records that showed a far more serious diagnosis than what they represented at the negotiating table.
Courts draw a sharp line between deception in how the settlement was reached and regret about the terms. Settling for too little because your lawyer underperformed or because you wanted the case over is not fraud. The other party has to have actively deceived you about something concrete.
Duress or Coercion
A settlement signed under duress can be voided because there was no genuine agreement. Duress means an unlawful threat or coercive pressure so severe you had no reasonable alternative but to sign. Physical threats qualify. So can extreme economic coercion, like threatening to destroy someone’s business unless they accept unfair terms.
This is a hard defense to win. Feeling rushed, pressured, or anxious during negotiations does not count. Courts expect settlement talks to involve some hardball. You have to show the pressure crossed from aggressive bargaining into conduct that effectively removed your ability to choose.
Mutual Mistake
If both parties shared an incorrect belief about a fact central to the agreement, a court may rescind the settlement. The textbook example is an injury case where both sides genuinely thought the plaintiff had a minor soft-tissue injury, and later medical evidence reveals a permanent spinal condition that existed all along. The settlement was built on a shared factual error about the injury itself.
The mistake has to be mutual and material. If only one side was wrong, or if the error was peripheral to the deal, this defense fails. A mistake about the law — like not realizing you could have claimed a broader category of damages — generally doesn’t qualify either.
Unconscionability
Courts can refuse to enforce a settlement whose terms are so one-sided that no reasonable person would have agreed to them. The doctrine has two pieces. Procedural unconscionability looks at unfairness in how the deal was made: hidden terms, wildly unequal bargaining power, misrepresentation during formation. Substantive unconscionability looks at whether the terms themselves are oppressively lopsided. A settlement is most likely to fall when both are present.
In practice this is the rarest ground. A sophisticated corporate defendant settling with an unrepresented, non-English-speaking plaintiff for a small fraction of clear damages might qualify. A merely bad deal will not.
When Your Injury Gets Worse After Settlement
This is the most common real-world reason people want to reopen a case, and it runs into two obstacles.
First, worsening symptoms are not automatically “newly discovered evidence.” Under Rule 60(b)(2), the evidence has to have existed at the time of settlement but been undiscoverable through reasonable effort, it can’t be cumulative of what you already had, it has to be admissible, and it has to be significant enough that it would likely have changed the outcome.2Legal Information Institute. After-Discovered Evidence A condition that develops or deteriorates after settlement is a new fact, not a hidden pre-existing one.
Second, and more painfully, the one-year clock runs from the date of judgment, not from the date you discover the new evidence. If your condition worsens three years after settlement, Rule 60(b)(2) is closed to you. Your only remaining route is the catchall provision, which requires extraordinary circumstances.
The realistic path in this situation is usually to argue that the settlement itself was tainted by fraud (the other side knew something about your condition they didn’t share) or by mutual mistake (both sides genuinely misunderstood the medical picture at the time).
Cases With Special Rules: Minors and Workers’ Compensation
Two categories of case have built-in protections that make reopening more realistic.
Settlements involving a minor must generally be approved by a judge, who independently reviews the terms to confirm the deal is in the child’s best interest.3eCFR. 32 CFR 536.63 – Settlement Agreements The minor also has to be represented by counsel in most situations. A settlement finalized without proper court review may be invalid from the start, and some jurisdictions allow these settlements to be revisited if the child’s circumstances change significantly before adulthood.
Workers’ compensation runs on its own track. Many state systems specifically allow injured workers to reopen a claim when their medical condition substantially worsens after settlement. You typically file a formal request within the state’s deadline and submit new medical evidence linking the change to the original injury. The type of settlement matters a lot. Structured settlements with periodic payments are generally easier to reopen. A full and final release in exchange for a lump sum usually waives the right to more benefits, though some states prohibit workers from waiving future medical care regardless of what the release says. If you took a lump sum and your condition later worsens, your best route is often the same one available in a regular civil case: proving fraud or fundamental mistake in the settlement itself.
If the Other Side Just Isn’t Paying, You Don’t Want to Reopen
This is worth flagging because the two situations get confused. If the problem is that the other party isn’t holding up their end of the deal, reopening the case is the wrong move. You want to enforce the settlement you already have.
The usual approach is a motion asking the court to compel compliance. If the settlement was incorporated into a court order, the judge can enforce it directly, and ignoring the order can lead to contempt. If the settlement was a private contract that was not incorporated into any order, enforcement may require a separate breach-of-contract action. Either way, you keep the deal — you just make them perform it.
What Happens If You Actually Succeed
Reopening does not mean adding to your settlement. It means erasing it. If a court sets aside the agreement, the entire deal disappears, including any payments already made, and both sides return to their pre-settlement positions. The original lawsuit becomes active again and you litigate the underlying dispute from scratch.
That is a real cost. You re-enter the uncertainty, expense, and time of active litigation with no guarantee of a better outcome than the settlement you just tore up. Before filing a motion to reopen, the honest question isn’t just whether you have grounds. It’s whether you’d rather have the money you already received or the chance to try the case over.