Family · Prenuptial agreement
Prenuptial Agreement Requirements in New York
What makes a prenuptial agreement valid and enforceable in New York: the writing and signature, the voluntariness rule, the financial disclosure each side must give, and what gets a prenup thrown out. Cited to the statute.
What makes a prenuptial agreement valid in New York
The writing and signature, voluntariness, and financial disclosure a court looks for before it will enforce a prenup.
Prenuptial agreement enforceability turns on the specific facts and on evolving case law, and New York courts scrutinize these agreements closely, especially the deed-style acknowledgment requirement. Confirm the current text of Domestic Relations Law section 236(B)(3) and recent decisions before relying on this.
| What makes a prenup valid | What it means |
|---|---|
| In writing and signed by both | Under Domestic Relations Law section 236(B)(3), the agreement must be in writing and subscribed, meaning signed, by both parties. An oral prenuptial agreement is not valid. |
| Acknowledged like a deed | The agreement must be acknowledged or proven in the manner required to entitle a deed to be recorded, which in practice means each party’s signature is acknowledged before a notary public. This step is required, not optional. |
| Free of fraud, duress, and overreaching | Even a properly executed agreement can be attacked. New York courts may set an agreement aside where it was procured through fraud, duress, or overreaching, or where it is unconscionable. |
| Signed voluntarily and understood | The agreement should reflect a knowing and voluntary decision. Full financial disclosure and separate lawyers are not strictly required by the statute, but their absence can support an overreaching or unconscionability claim. |
| What makes a prenup unenforceable | What it means |
|---|---|
| No proper acknowledgment | An agreement that is not acknowledged in the form required to record a deed is invalid, even if the signatures are genuine and the parties intended to be bound. This is the most common ground for throwing out a New York prenup. |
| Fraud, duress, or overreaching | A court can set the agreement aside if it was procured by fraud, such as a false promise or a hidden asset, or by duress or overreaching, such as coercion or an abuse of one party’s trust. |
| Unconscionability | An agreement can be set aside as unconscionable. New York courts have set aside terms that are so one-sided that no fair and honest person would offer them and no rational person would accept them. |
| Child support and custody terms | Provisions about a child’s custody, care, and support are always subject to the court’s review in the child’s best interest. Parents cannot bind the court on child support or custody through a prenup. |
What you can do right now
Concrete, neutral steps to sign a prenup that will hold up in New York. This is legal information, not legal advice.
- Put it in writing well before the wedding
Have the agreement drafted in writing and signed with time to spare before the wedding. A last-minute signing can support a duress or overreaching claim later.
- Exchange full financial disclosure
Both people should exchange a complete and honest list of assets, debts, and income. Attaching financial statements to the agreement helps defeat a later claim of fraud or overreaching.
- Sign before a notary and use independent counsel
Each party’s signature must be acknowledged before a notary in the form used to record a deed. Using separate lawyers is not required but strongly supports that the agreement was voluntary and valid.
A prenuptial agreement decides property and support if a marriage ends, and a court will scrutinize how it was signed. A licensed family-law attorney can draft or review one; the state bar can refer you to one.
→ New York State Bar Association, Find a LawyerThis is general legal information, not legal advice. Enforceability turns on the exact statute, the case law, and how the agreement was signed, so confirm the current requirements against the statute and talk to a lawyer.
What couples in New York get wrong about prenups
New York is not a Uniform Premarital Agreement Act state. Prenuptial agreements are governed by Domestic Relations Law section 236, Part B, subdivision 3, together with a body of case law. The statute says an agreement made before the marriage is valid and enforceable if it is in writing, subscribed by the parties, and acknowledged or proven in the manner required to entitle a deed to be recorded. That acknowledgment requirement is strict. New York courts have held that an agreement without a proper notarial acknowledgment is invalid even when the signatures are genuine, which is different from the disclosure-focused rules in Uniform Act states. Once an agreement is properly executed it carries a heavy presumption of validity, and the party trying to escape it bears a high burden. A court can still set it aside where it was procured through fraud, duress, or overreaching, or where it is unconscionable. Provisions about a child’s custody, care, and support remain subject to the court’s review in the child’s best interest. This is legal information, not legal advice.
Common questions
Does a prenuptial agreement have to be notarized in New York?
Yes. Under Domestic Relations Law section 236(B)(3) the agreement must be acknowledged in the manner required to record a deed, which means each party’s signature is acknowledged before a notary. Without that step the agreement is not valid.
Can a New York prenup decide child support or custody?
No. Provisions about a child’s custody, care, education, and support are subject to the court’s power to review them in the child’s best interest. The parents cannot bind the court on those issues through a prenup.
What makes a prenuptial agreement unenforceable in New York?
The most common ground is a missing or defective acknowledgment before a notary. Beyond that, a court can set the agreement aside for fraud, duress, overreaching, or unconscionability.
Do both people need their own lawyer for a New York prenup?
The statute does not require separate lawyers, but each party using independent counsel and exchanging full financial disclosure strongly supports that the agreement was voluntary and helps defeat a later overreaching claim.
Not legal advicePlainStatute provides plain-language summaries of public law for general information only. This is not legal advice. Statutes change; always confirm current requirements with the official source linked above before acting.