Can a prenuptial agreement be invalidated in New York?

What the Law Says

New York law treats prenuptial agreements as binding contracts—but they can be set aside if certain legal defects exist. The key statute is the Domestic Relations Law, which sets strict requirements for enforceability.

Under New York law, a prenuptial agreement must be in writing, signed by both parties, and executed before marriage. It becomes effective only upon marriage.

To be valid, each party must have had a reasonable opportunity to consult with independent legal counsel—or knowingly waived that right in writing. Courts also require full and fair disclosure of assets and income before signing.

An agreement may be invalidated if it was signed under duress, fraud, or misrepresentation—or if it’s found to be unconscionable at the time of execution (not just enforcement).

Statutory Text

A premarital agreement shall not be enforceable against a party if such party proves that: (1) such party did not execute the agreement voluntarily; or (2) the agreement was unconscionable when it was executed.

— Domestic Relations Law § 53(2) — Premarital agreements

Statutory Text

If a party to a premarital agreement waives the right to disclosure of the other party's property or financial obligations, such waiver shall be in writing and shall be signed by the party waiving disclosure.

— Domestic Relations Law § 53(3)(a) — Disclosure requirements

What Courts Have Said

New York courts closely examine whether both parties entered the agreement freely and with full understanding—especially when one side lacked counsel or signed shortly before the wedding.

What to Do

Sources