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What are the legal requirements for a valid prenuptial agreement?

On Behalf of | Jul 1, 2025 | Divorce

If you’re thinking about a prenuptial agreement in Illinois, you need to know the legal requirements that make the agreement valid. A well-drafted prenuptial agreement can help protect your assets if you divorce, but for the agreement to hold up in court, you must meet specific conditions.

Full disclosure of assets and liabilities

In Illinois, both parties must fully disclose their financial situation before signing a prenuptial agreement. You must include details about your assets, debts, income, and any other relevant financial information. If you fail to do this, a court may invalidate the agreement. Full transparency ensures that both parties understand each other’s financial standing before agreeing to the terms.

Voluntary agreement

The law requires that both parties enter the agreement voluntarily. If either party feels coerced or pressured into signing, a court could invalidate the prenuptial agreement. It’s essential that both parties have enough time and freedom to review the agreement and make decisions without undue pressure. Each person should ideally consult with their own attorney before signing.

Fair and reasonable terms

For a prenuptial agreement to be enforceable in Illinois, the terms must be fair and reasonable at the time of signing. Courts will look at whether the agreement was equitable when it was signed and whether it would create an unfair burden on one party if enforced. If the terms seem overly one-sided or unfair, the court may invalidate the agreement.

Signed in writing

A prenuptial agreement must be in writing to be legally binding in Illinois. You cannot rely on verbal agreements or informal promises. Both parties must sign the document, and the agreement should include the correct date.

Not against public policy

Illinois law also requires that prenuptial agreements contain terms that align with public policy. Provisions that waive child support or remove a party’s right to inherit property will not hold up in court. A court will refuse to enforce those terms if they violate public policy.

By following these steps, you can ensure that your prenuptial agreement remains valid and enforceable under Illinois law.

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