A contract signed under duress is either void or voidable depending on the kind of pressure used. Physical compulsion, where someone forces your hand or signs for you while restraining you, produces a void contract: legally, no agreement ever existed. Threats, coercion, and improper economic pressure produce a voidable contract: the deal is valid and enforceable until you take steps to cancel it. That difference controls almost everything that follows, including whether a good-faith buyer can keep property transferred under the contract, whether silence can bind you to the deal, and how quickly you have to act.
Why Void and Voidable Lead to Very Different Outcomes
A void contract is treated as if it never happened. It cannot be ratified, so no amount of silence, delay, or continued performance converts it into a binding agreement. And because no valid title ever passed, someone who later buys property that moved under a void contract gets nothing, even if they paid full price and knew nothing about the duress.
A voidable contract works the opposite way on each of those points. It is legally in force from the moment it is signed. The victim has the power to cancel it, but until they do, obligations run normally. A good-faith buyer who takes property transferred under a voidable contract can sometimes keep it. And the right to cancel can be lost through ratification, which is the trap most people walk into without realizing.
Physical Compulsion: Void From the Start
The Restatement (Second) of Contracts, Section 174, treats a signature extracted by physical force as producing no contract at all, on the theory that the signer was “a mere mechanical instrument.” There was never genuine assent, so there is nothing to cancel and nothing to ratify. These cases are rare in practice. Almost everything the courts actually see falls into the second category.
Threats and Coercion: Voidable Until You Act
Under Section 175 of the Restatement, a contract is voidable when agreement was induced by an improper threat that left no reasonable alternative but to sign. The word doing the work there is “improper.” Courts have found threats improper when a party threatens to:
- Commit a crime or tort, such as physical harm or property damage.
- File legal proceedings the party knows are baseless, purely as leverage.
- Expose private or embarrassing information unless the other side agrees.
- Breach a duty of good faith under an existing contract to force new terms.
The threat does not have to come from the other party to the contract. A threat by a third party still makes the contract voidable, unless the party on the other side gave value in good faith and had no knowledge of what was happening.
Economic Duress and Where Hard Bargaining Ends
Economic duress is the most argued and the hardest to prove, because every commercial deal involves pressure of some kind. Courts generally require three things: a wrongful or improper act by the other party, financial distress caused by that act, and the absence of any reasonable alternative to accepting the terms.
That last element decides most cases. If you had other options, even unattractive ones, courts rarely find duress. A supplier charging a steep price because they know you need the product is not committing duress. A monopoly imposing tough terms is not committing duress. Unequal bargaining power alone does not make a contract voidable. In one case, a contractor successfully claimed duress after signing an indemnity agreement because he needed money to repay a bank loan taken out to buy materials from the other party; the court found that the other company had deliberately exploited his financial vulnerability and left him no realistic way out. Courts have described the scope for finding duress in ordinary arm’s-length deals as extremely limited.
How to Rescind a Voidable Contract
Because the contract is valid until you cancel it, you have to actually cancel it. The remedy is rescission, which unwinds the agreement and attempts to return both parties to where they started.
Rescission has conditions. You have to give notice that you are rescinding, and you have to offer to return whatever you received under the contract. You cannot keep the benefits of the deal while arguing you were coerced into it. And courts will deny rescission entirely if too much has changed for both sides to be substantially restored to their original positions. In that situation, the victim may be left pursuing money damages through a separate claim rather than canceling the contract.
Timing matters. “Prompt” action is measured from when the duress ends, not from when the contract was signed. You are not expected to rescind while still under threat. But once the pressure lifts, the clock runs, and unreasonable delay without a good explanation can defeat the claim.
How You Can Accidentally Lose the Right to Cancel
This is the part that catches people. Because a voidable contract is legally in effect until you cancel it, acting as though it is binding can make it permanently binding. The doctrine is called ratification, and it turns on knowledge: once you know, or reasonably should know, about the facts giving you the right to rescind, your conduct starts to count.
The common ways people ratify a contract they could otherwise have canceled:
- Continuing to perform after the pressure stops, such as making payments or delivering goods.
- Accepting benefits under the contract after learning of the right to rescind.
- Staying silent for an unreasonable period after the facts are known.
- Filing a lawsuit to enforce part of the contract, which courts can treat as ratifying the whole.
Actions taken before you knew about the defect generally do not count. But every week of continued performance after the duress ends is more evidence that you accepted the deal. If you believe you signed under duress, the practical move is to stop performing and communicate your intent to rescind as soon as it is safe to do so.
What You Have to Prove
The person claiming duress carries the burden. That means more than testifying that you felt pressured. You need evidence of what the other party did, and you need to show that it left you without a real choice.
On the no-reasonable-alternative question, courts look at the full picture: the time pressure you faced, whether you had access to legal counsel, the financial stakes, and whether the other party deliberately engineered your lack of options. Someone who signed a bad contract without shopping around is in a very different position than someone whose existing options were sabotaged.
On the threat itself, written records are the strongest evidence. Emails, texts, and letters with explicit threats give a court something concrete. Witness testimony about the threats or your state at the time can help, and so can lawfully obtained recordings. Causation matters too: a history of refusing similar terms before the threats, or an attempt to undo the contract as soon as the pressure lifted, supports the “but for” link between the coercion and the signature.
A Note on Undue Influence
Duress is not the only doctrine that can make a contract voidable. Undue influence, covered by Section 177 of the Restatement, addresses unfair persuasion within a relationship of domination or trust, such as parent and minor child, attorney and client, or doctor and patient. It does not require any threat; the power imbalance itself is what makes the pressure improper. If your situation looks less like coercion and more like exploitation of a trusted relationship, that is a different claim with a different focus, built on the relationship and the fairness of the transaction rather than on threats and alternatives.