Voidable Contract

A voidable contract is an agreement that has full legal effect from the moment it is formed, but contains a defect that gives one of the parties the option to either avoid (rescind) it or ratify (affirm) it. Until that party exercises the right to rescind, the contract binds both sides and can be enforced in court. This distinguishes it from a void contract, which has no legal effect from the outset (e.g., an agreement to commit a crime), and from an unenforceable contract, which exists but cannot be sued upon due to a procedural bar such as the Statute of Frauds.

Typical grounds that render a contract voidable include:

• Misrepresentation — a false statement of fact that induced the other party to contract.
• Fraud — knowing deceit intended to induce reliance.
• Duress — entry into the contract under unlawful threat or coercion.
• Undue influence — abuse of a position of trust or dominance.
• Mistake — in some jurisdictions, certain mutual or unilateral mistakes.
• Incapacity — minors, intoxicated persons, or persons lacking mental capacity may avoid contracts they entered while incapacitated.

The party with the power of avoidance must generally act within a reasonable time after discovering the defect, and may lose the right through affirmation, delay (laches), or inability to restore the other party to its pre-contract position (restitutio in integrum).

The concept is recognised across both common-law and civil-law systems. In English law it is developed through cases such as Car & Universal Finance v Caldwell [1965] on rescission for fraud. In U.S. law it is codified in part by the Restatement (Second) of Contracts §§ 7, 164, and 174–177, and by UCC Article 2 for sales of goods. Civil-law equivalents appear in the French Civil Code's regime of nullité relative and the German BGB's Anfechtung (§§ 119–124).

For MUN and policy contexts, the term most often arises in commercial-law harmonisation debates (e.g., UNCITRAL instruments) and in discussions of consumer protection.