Can I Reopen My Claim After Signing a Settlement Release in Massachusetts?

Usually not, and it is worth saying that first rather than last. A release is a contract, and Massachusetts courts enforce it as one. The narrow door that does exist opens on a distinction the Supreme Judicial Court drew in 1986 and it is not the distinction most people expect: a release can be set aside for mutual mistake where the parties were wrong about whether an injury existed at all, and not merely because a known injury turned out to be worse than anyone thought. Getting worse is the ordinary risk a release is written to transfer. Being injured in a way nobody had identified when the paper was signed is a different problem, and Massachusetts treats it differently. If you have signed something and your condition has changed, the first practical step is to get a copy of the exact document, because everything below turns on its words and on what was known when it was signed. To talk through a Massachusetts injury claim, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day, and the first telephone consultation is free.

Start From the Default: It Holds

The reason releases exist is that insurers pay money to end claims permanently, and a document that could be reopened whenever a claimant felt differently later would be worth nothing to the party paying for it. Massachusetts courts start from that premise and they say so plainly.

The Supreme Judicial Court’s statement of the rule comes from Tewksbury v. Fellsway Laundry, Inc., 319 Mass. 386 (1946), quoted in the later decision that governs this area. A release of a claim for personal injuries, the court held, “cannot be avoided merely because the injuries proved more serious than the releasor believed them to be at the time of executing the release, and… in order to invalidate a release on account of mutual mistake, the mistake must relate to a past or present fact material to the contract and not to an opinion respecting future conditions as a result of present facts.”

Read that sentence twice, because it is the whole game. A prediction that turned out wrong is not a mistake of fact. In Tewksbury a young plaintiff settled a claim for a face abrasion, a groin laceration and a fractured femur, and afterwards developed osteomyelitis in the same leg. The court refused to set the release aside. The infection developed after the accident and after the signature, so what the parties had been wrong about was the future, and being wrong about the future is what a settlement is for.

Answer Capsule

Usually not. In Massachusetts a settlement release is a contract and is enforced as one, and it cannot be avoided just because the injury turned out to be worse than expected. There is one recognised route. In LaFleur v. C.C. Pierce Co., 398 Mass. 254 (1986), the Supreme Judicial Court adopted the “unknown injury” rule, holding that a release of claims for personal injuries “may be avoided on the ground of mutual mistake if the parties at the time of signing the agreement were mistaken as to the existence of an injury, as opposed to the unknown consequences of known injuries.” The controlling question is whether there was “a conscious and deliberate intention by the parties to release claims for injuries existing but not known to them at the time of the agreement,” and the person seeking to undo the release carries the burden of proving it. Separately, G.L. c. 231B, sec. 4 provides that a release given in good faith to one of several tortfeasors does not discharge the others unless its terms say so, so a claim against a different responsible party may survive a release that ended the claim against one.

The Line Massachusetts Draws: an Unknown Injury, Not an Unknown Outcome

Forty years after Tewksbury the court faced the other version of the problem. Michael LaFleur had a forklift blade fall on his right foot. A company doctor called the injury superficial and an X-ray showed no fracture. He settled for $4,000 in a lump-sum workers compensation agreement that said he understood “this is a complete and final settlement of my claim and that I will not be able to reopen my claim or seek further benefits because of this injury.” What nobody knew was that the accident had aggravated a preexisting arterial disease. Both of his legs were later amputated.

The Supreme Judicial Court called this “a question of first impression in this Commonwealth” and distinguished it from Tewksbury directly. In Tewksbury the court was “confronted with a situation in which the consequences of an injury turned out to be more serious than expected. In this case, however, we are dealing with a separate condition which existed and yet was unknown to the parties at the time of contract.”

Then it adopted the rule: a release of claims for personal injuries “may be avoided on the ground of mutual mistake if the parties at the time of signing the agreement were mistaken as to the existence of an injury, as opposed to the unknown consequences of known injuries.” The judgment against LaFleur was reversed and the case sent back for trial.

So the question a Massachusetts court asks is not “did this get worse.” It is “was there already something wrong that neither side knew about.” A herniated disc that was there on the day of the crash and was never imaged is a candidate. A known sprain that failed to heal is not.

What a Court Actually Weighs

LaFleur does not stop at the rule. It lists what matters, and the list is practical rather than abstract. “Of course, the intention of the parties is controlling, and the relevant inquiry is whether there has been a conscious and deliberate intention by the parties to release claims for injuries existing but not known to them at the time of the agreement.”

The opinion then names the factors to be considered on that question:

• the language of the agreement, meaning what the document itself says about what is being given up;
• the circumstances of its negotiation and execution, including the legal representation of the parties, so whether anyone was advised, and by whom, is part of the record;
• the seriousness of the unknown injury; and
• the consideration paid to the plaintiff for the release of the defendants’ liability, meaning whether the money bears any relationship to what was actually wrong.

And it adds a test that reads like common sense written down: the inquiry “should include a consideration as to whether the plaintiff suffers from an unknown injury which is so serious as to indicate clearly that, if it had been known, the release would not have been signed.”

That last line explains why the doctrine rarely helps in a small case. A $4,000 settlement against two amputations is a mismatch a court can see. A modest settlement against a modest injury that got somewhat worse is not.

The Words on the Page, and the Words Around It

A release that says in terms that it covers unknown injuries is a much harder document to escape than one that does not, because the whole inquiry is about intention.

In LaFleur the form was a standardized one that “merely released claims ‘for all injuries received by Michael LaFleur on or about January 21 and February 15, 1975.’” The court found that it did “not clearly or unambiguously indicate that the parties intended to discharge liability for the unknown injury to LaFleur’s arterial system,” and held that extrinsic evidence could therefore be introduced to work out what the parties meant, citing Mickelson v. Barnet, 390 Mass. 786, 792 (1984) for the point that the parol evidence rule is no bar to evidence of intent when mistake is alleged.

Two practical consequences follow. The first is that the exact wording of the document you signed is not a detail, it is the case. The second is that what was said, sent and known around the signing can be evidence, which is a reason to keep the adjuster’s letters, the medical records that existed on that date, and any note about what you were told your injury was.

Who Has to Prove What

The burden sits on the person trying to undo the release. LaFleur was remanded for trial “where LaFleur bears the burden of proving that the industrial accident aggravated a preexisting Buerger’s disease unknown to the parties, and that the parties did not intend to discharge any claims for these specific medical consequences.”

Notice that there are two things to prove, not one. That the injury existed and was unknown. And that the parties did not intend to release it. Losing either half loses the argument, and the second half is where a broadly drafted release does its work.

Releasing One Person Does Not Release Everyone

This is the route that gets missed most often, and it is statutory rather than doctrinal.

G.L. c. 231B, sec. 4 provides that when a release or covenant not to sue “is given in good faith to one of two or more persons liable in tort for the same injury,” it “shall not discharge any of the other tortfeasors from liability for the injury unless its terms so provide; but it shall reduce the claim against the others to the extent of any amount stipulated by the release or the covenant, or in the amount of the consideration paid for it, whichever is the greater.” It also discharges the settling party “from all liability for contribution to any other tortfeasor.”

In plain terms: settling with one responsible party does not automatically end a claim against a different one, unless the release says it does. A crash with more than one at-fault driver, a work injury with a negligent third party alongside the employer, a fall where the property owner and a contractor both had a hand in it. Those are separate defendants, and whether a release reached them depends on its terms. What the settlement does do is reduce the remaining claim by the greater of the amount the release stipulates or the amount actually paid.

So the first question after “can this release be undone” is often the better question: does this release even cover the party who should be paying.

Some Money Is Not Governed by That Release At All

A release ends the contract it describes and no more. Personal injury protection is a separate obligation, owed by a different insurer under a different policy, and a release of an at-fault driver’s liability does not automatically extinguish it. Under G.L. c. 90, sec. 34M a PIP claim must be presented to the company providing the benefits “as soon as practicable after the accident occurs, and in every case, within at least two years from the date of accident.” The same section requires the insurer, on notification of disability from a licensed physician, to “commence medical payments within ten days or give written notice of its intent not to make such payments, specifying reasons for said nonpayment,” and provides that where benefits stay unpaid for more than thirty days the unpaid party may sue in contract, with costs and reasonable attorney’s fees assessed against the insurer if the claim is proved.

None of that is a way around a release. It is a reminder that the document you signed has a scope, and reading it is how you find out what it left alone. There is more on how the no-fault layer works in personal injury protection in Massachusetts.

The Clocks Are Not the Same Clock

Two limitation periods matter here and they run differently.

An action in tort for the underlying injury must be commenced within three years after the cause of action accrues, under G.L. c. 260, sec. 2A. That is the deadline covered in the Massachusetts statute of limitations for personal injury, and it does not pause because a release exists.

An action on a contract, other than one to recover for personal injuries, must be commenced within six years, under G.L. c. 260, sec. 2. A release is a contract, so the argument about the contract is not necessarily on the same schedule as the claim it settled. The same point cuts the other way on the terms a release carries forward: a confidentiality clause is a contract promise too, and it keeps binding long after the money is spent, which is covered in whether a Massachusetts injury settlement can be kept confidential. Which period applies to a particular attempt to set aside a particular release is a legal question decided on the facts of that case, which is exactly the kind of question worth asking early rather than late.

What to Do If You Have Already Signed

None of this is a plan. It is what makes a plan possible.

Get the actual document, not a description of it. Ask the insurer for a copy of the signed release and the check or draft. Write down the date you signed. Collect the medical records that existed on that date, because the argument depends on what was diagnosed then rather than what is diagnosed now. Get the record of the new diagnosis, and specifically anything from a physician about whether the condition existed at the time of the accident or developed afterwards, since that is the exact line the law draws. Keep the correspondence.

Then have someone read it. Most releases in Massachusetts hold, and an honest answer that a document is airtight is worth having quickly. The cases where it is not airtight tend to be the ones where the mismatch between what was known and what was true is large, which is also when time matters most.

Related reading on this site: how a Massachusetts car accident settlement moves, which explains why maximum medical improvement matters before anyone signs anything; what happens when the at-fault driver offers to pay out of pocket, which is the same trap in a different costume; whether liability waivers are enforceable in Massachusetts, which covers the document signed before an injury rather than after one; and court approval of a settlement for a child, which is the one category of injury settlement a judge reviews before it becomes final.

Personal injury matters at Jim Glaser Law are handled on a contingency fee, meaning no attorney fee unless there is a recovery; costs and expenses are handled separately and are explained in the fee agreement before anything is signed. The intake line is answered 24 hours a day at (617) JIM-WINS, and the first telephone consultation is free.

Frequently Asked Questions

Q: I signed a release and my injury got worse. Can I reopen the claim?

A: On those facts alone, no. That is the situation the Supreme Judicial Court addressed in Tewksbury v. Fellsway Laundry, Inc., 319 Mass. 386 (1946), holding that a release “cannot be avoided merely because the injuries proved more serious than the releasor believed them to be at the time of executing the release,” and that a mistake sufficient to invalidate a release “must relate to a past or present fact material to the contract and not to an opinion respecting future conditions as a result of present facts.” A known injury that worsened is a wrong prediction about the future, and a settlement is the instrument for allocating exactly that risk.

Q: What if there was an injury nobody knew about when I signed?

A: That is the recognised route, and it is a different question from the last one. In LaFleur v. C.C. Pierce Co., 398 Mass. 254 (1986), the Supreme Judicial Court adopted the “unknown injury” rule, holding that a release of claims for personal injuries “may be avoided on the ground of mutual mistake if the parties at the time of signing the agreement were mistaken as to the existence of an injury, as opposed to the unknown consequences of known injuries.” The condition has to have existed at the time of the agreement and to have been unknown to both sides. Proving that is the work, and it is fact-specific.

Q: What does a court look at in deciding?

A: LaFleur names the factors: the language of the agreement, the circumstances of its negotiation and execution including the legal representation of the parties, the seriousness of the unknown injury, and the consideration paid for the release. The opinion adds that the inquiry “should include a consideration as to whether the plaintiff suffers from an unknown injury which is so serious as to indicate clearly that, if it had been known, the release would not have been signed.” A large gap between what was paid and what was actually wrong is central to the analysis.

Q: My release says it covers all claims, known and unknown. Does that end it?

A: It makes the argument considerably harder, because the whole inquiry is about intention. LaFleur turned in part on the fact that the form there “merely released claims ‘for all injuries received’” on stated dates and did “not clearly or unambiguously indicate that the parties intended to discharge liability for the unknown injury.” Where the document is not clear on the point, the court allowed extrinsic evidence of what the parties intended, citing Mickelson v. Barnet, 390 Mass. 786 (1984). Where a release addresses unknown injuries expressly, that evidence has much less to do.

Q: Who has to prove the mistake?

A: The person trying to set the release aside. LaFleur was remanded for trial with the plaintiff bearing “the burden of proving” both that the accident aggravated a preexisting condition unknown to the parties and “that the parties did not intend to discharge any claims for these specific medical consequences.” Both halves have to be established, not just the medical one.

Q: I settled with one driver. Is my claim against the other one gone too?

A: Not automatically. G.L. c. 231B, sec. 4 provides that a release given in good faith to one of two or more persons liable in tort for the same injury “shall not discharge any of the other tortfeasors from liability for the injury unless its terms so provide.” The remaining claim is reduced by the amount the release stipulates or the consideration paid for it, whichever is greater, and the settling party is discharged from liability for contribution. So the terms of the document decide it, which is another reason to read the one you signed rather than assume its effect.

Q: Does signing a release with the at-fault driver’s insurer end my PIP claim?

A: Not by itself. Personal injury protection is a first-party obligation under a different policy and it is governed by G.L. c. 90, sec. 34M, which requires the claim to be presented “within at least two years from the date of accident” and requires the insurer to commence medical payments within ten days of notification of disability from a licensed physician or give written reasons for not doing so. A release reaches what its terms reach. What it covers is a question about that specific document.

Q: How long do I have to raise any of this?

A: There are two clocks and they differ. G.L. c. 260, sec. 2A gives three years for an action in tort from when the cause of action accrues, and G.L. c. 260, sec. 2 gives six years for an action of contract other than one to recover for personal injuries. Which one governs a particular attempt to set aside a particular release is a legal question decided on the facts, so the safe assumption is the shorter one until someone has read the file.

Q: Is Jimmy Knows AI giving me legal advice?

A: No. This is general information about Massachusetts law, not legal advice, and reading it does not create an attorney-client relationship. Whether a particular release can be challenged depends on its exact wording, on what was known and documented when it was signed, and on medical evidence this article cannot see, and cases interpreting these rules continue to develop. For advice about a specific matter, speak with a Massachusetts attorney. The Jim Glaser Law line is answered 24 hours a day at (617) JIM-WINS, and the first telephone consultation is free.