Do Prenups Hold Up in Court? (w/Examples) + FAQs

Yes — prenuptial agreements hold up in court the vast majority of the time, as long as they follow state law and basic rules of fairness. Courts across the United States treat prenups as legally binding contracts that deserve enforcement. The catch is that certain mistakes during the drafting or signing process can give a judge reason to throw the entire agreement out.

The Uniform Premarital Agreement Act (UPAA), drafted in 1983 by the Uniform Law Commission, provides the legal backbone for prenup enforcement in 26 states and the District of Columbia. Under the UPAA, a prenup must be in writing, signed by both parties, and entered into voluntarily. If any of those basic elements is missing, the agreement is vulnerable. A 2022 Harris Poll found that 15% of married or engaged couples had signed a prenup — up from just 3% in 2010. Meanwhile, over 62% of divorce attorneys reported a rise in prenup requests, with millennials driving much of that trend.

Here is what you will learn in this article:

• 🔍 The exact legal reasons courts uphold or throw out prenuptial agreements
• ⚖️ Real court cases where prenups were enforced — and where they were tossed
• 🏠 How prenups protect (or fail to protect) businesses, debt, and spousal support
• 📋 The most common mistakes that make prenups unenforceable
• ❓ Answers to the most frequently asked questions about prenups and divorce court

The Federal Framework: UPAA and UPMAA

No single federal law governs prenuptial agreements. Instead, the Uniform Premarital Agreement Act (UPAA) and its updated version, the Uniform Premarital and Marital Agreements Act (UPMAA), serve as model laws that states can adopt. The UPAA covers only agreements made before marriage, while the UPMAA expands coverage to include postnuptial agreements as well.

Under the UPAA, couples can agree on a wide range of financial matters. These include property rights, spousal support, debt allocation, inheritance rights, and even choice of law provisions. However, the UPAA does not allow couples to contract around child support obligations because child support is considered a right that belongs to the child, not the parents.

The UPMAA added extra protections. It requires that a prenup cannot be enforced if it was executed involuntarily due to fraud, deceit, duress, coercion, misrepresentation, or overreaching. It also bars enforcement of agreements that were unconscionable at the time of signing — meaning terms so one-sided that no reasonable person would agree to them. States that adopted the UPMAA give courts a flexible framework to evaluate both the process used to create the agreement and the substance of its terms.

Not every state follows these model laws the same way. Some states, like Massachusetts, never adopted either act and instead use their own “fair and reasonable” standard that requires prenups to be fair both when signed and when enforced. This means a prenup that seemed perfectly fine in 2005 could be struck down in 2025 if the circumstances have changed in a way that makes enforcement unjust.

Why Courts Throw Out Prenups: The Core Reasons

Courts do not take throwing out a signed contract lightly. The party seeking to invalidate a prenup bears a heavy burden of proof. But when certain red flags appear, judges will act. Here are the primary reasons a prenup gets tossed.

Duress and Coercion

A prenup signed under pressure is not voluntary. Courts look at when the agreement was presented, the emotional state of the parties, and whether there was any manipulation involved. Some legal sources suggest that agreements signed within 60 days of the wedding may be challengeable. Duress has been found in cases where the wedding was days away, invitations had been sent, large sums of money had been spent, and canceling would be humiliating and costly.

In the Anne Griffin case, the wife of billionaire hedge fund manager Ken Griffin asked an Illinois court to void their prenup. She claimed they had “argued intensely” in the days before the wedding and that she signed the agreement just three hours before the rehearsal dinner. She also alleged her husband sent her to a psychologist — with whom he had a prior professional relationship — who then convinced her to sign.

Lack of Financial Disclosure

Hiding assets or lying about your net worth is one of the fastest ways to get a prenup thrown out. Both parties must provide complete and truthful financial statements. If one spouse understates the value of a business, fails to mention a bank account, or misrepresents their income, the other spouse did not have the information needed to make an informed decision. Courts treat this as a fundamental flaw in the agreement’s formation.

Unconscionability

Unconscionability comes in two forms: procedural and substantive. Procedural unconscionability examines how the agreement was created — was one party coerced, uninformed, or without access to a lawyer? Substantive unconscionability examines the terms themselves — are they so lopsided that no reasonable person would agree?

A prenup does not need to be perfectly equal. A disproportionate split alone does not make a prenup unenforceable. But when the terms are so extreme that enforcing them would leave one spouse destitute or on public assistance, courts draw the line.

Lack of Independent Legal Counsel

While not every state requires both parties to have their own attorney, the absence of independent legal counsel creates a strong argument for invalidity. If one party’s attorney was provided or paid for by the other party, that attorney may be seen as partial. Courts in states like California are especially strict about this requirement.

Public Policy Violations

Prenups cannot include terms that violate public policy. The most common example is child support: you cannot waive or limit a child’s right to financial support from a parent. Custody provisions written into a prenup are also unenforceable because courts must decide custody based on the child’s best interests at the time of divorce, not based on an agreement signed years earlier.

Real Court Cases: Prenups That Were Thrown Out

Seeing how courts handle these issues in real life paints a clearer picture than any legal textbook.

Petrakis v. Petrakis (New York)

Elizabeth Petrakis signed a prenup four days before her wedding to Peter Petrakis, a commercial property developer worth $20 million. The prenup would have given her $25,000 per year of marriage — and nothing else. Elizabeth initially refused to sign, but Peter allegedly promised he would tear up the prenup once they had children. He never did.

A New York appellate court threw out the prenup based on fraud. The court found that Peter’s false promise — which induced Elizabeth to sign an agreement she would not have agreed to otherwise — was enough to invalidate the entire contract. This case marked an unprecedented use of fraud as a basis for overturning a prenup.

Steven Spielberg and Amy Irving

Director Steven Spielberg and actress Amy Irving signed a prenup on a scrap of paper without attorney representation for Irving. When they divorced in 1989 after four years of marriage, Irving challenged the agreement. A California court invalidated it because Irving had no independent legal counsel when she signed. Under California’s community property laws, Irving received $100 million — one of the largest divorce settlements at the time.

Andrew B. v. Abbie B. (Alaska)

The Supreme Court of Alaska found a prenup unconscionable on both procedural and substantive grounds. The agreement was poorly written, with inaccurate statements and missing sections. It was presented to Abbie on the eve of a destination wedding while she was under the influence of alcohol and painkillers. The court had little trouble striking it down.

Bates v. Bates (Florida)

A Florida court invalidated a prenup after finding duress and coercion. The wife had recently turned 18, had limited English fluency, and had no business experience. The husband repeatedly told her that signing a prenup was a legal requirement in the United States — which is false. The court concluded she was manipulated into signing.

Taha v. Elzemity (New York, 2018)

A prenup that left the wife with a $20,000 lump sum payment was struck down as unconscionable. The husband earned $300,000 per year, the wife was unemployed and the primary caregiver for their young children. Enforcing the agreement would have left her destitute and potentially dependent on public assistance.

O’Daniel v. O’Daniel (Tennessee)

After the couple married, the wife was diagnosed with a serious illness requiring multiple hospitalizations. Their prenup contained an alimony waiver. The trial court upheld it, but the Tennessee Court of Appeals reversed the decision. The court found that enforcing the waiver would “probably result in Wife becoming a public charge,” and struck down the alimony waiver based on a public policy exception.

Real Court Cases: Prenups That Were Upheld

Courts do not throw out prenups because one party simply regrets the deal. When proper procedures are followed and the terms are reasonable, judges enforce prenups as written.

Deion Sanders v. Pilar Sanders (Texas)

NFL legend Deion Sanders and his ex-wife Pilar went through an intense court battle in 2012 over the validity of their prenup. Pilar argued the prenup was “partially forged” and “partially signed under pressure.” The prenup, signed in 1999, even included an immediate $100,000 signing bonus paid to Pilar for agreeing to sign. The Texas court upheld the agreement, and divorce attorneys quoted at the time explained that “it’s not easy to get a prenuptial agreement tossed out.”

Tiger Woods and Elin Nordegren

Tiger Woods and Elin Nordegren signed a prenup before their 2004 wedding that would have paid her $20 million after 10 years of marriage. After Woods’s infidelity scandal broke in 2009, the couple renegotiated the prenup rather than challenging it in court. Nordegren reportedly received $100 million in the 2010 divorce settlement — more than $80 million above the original prenup terms. The original prenup was never invalidated; instead, it was modified through negotiation, which shows how prenups can serve as a starting point rather than a final word.

Community Property vs. Equitable Distribution States

Where you live changes everything about how a prenup interacts with your divorce. The United States has two systems for dividing marital property, and they operate in very different ways.

In community property states, everything earned or acquired during the marriage is presumed to belong equally to both spouses. Without a prenup, a court will split marital property down the middle. A prenup overrides that default and lets the couple decide their own terms.

In equitable distribution states, courts divide property based on what they consider fair, weighing factors like each spouse’s income, contributions to the marriage (including homemaking), the length of the marriage, and each spouse’s economic circumstances. A prenup removes this guesswork and puts the couple — not the judge — in the driver’s seat.

California’s Special 7-Day Rule

California adds an extra layer of protection. Under California Family Code §1615(c)(2), there must be at least seven calendar days between the time a party is first presented with the final version of the prenup and the time they sign it. This “7-day rule” exists to prevent last-minute coercion.

Violating this rule is one of the most common mistakes couples make in California. If the final version is presented six days before signing — even if both parties agree and want to move forward — the prenup may be unenforceable. Couples should begin the prenup process at least three months before the wedding to avoid this trap.

How States Differ on Challenging a Prenup

The ease of challenging a prenup varies by state. Rhode Island has one of the heaviest burdens on the party trying to invalidate a prenup, requiring “clear and convincing evidence” — a high legal standard. Florida, by contrast, gives challengers two separate paths to unenforceability: proving involuntary execution or proving unconscionability, rather than requiring both.

How Prenups Protect Businesses

For entrepreneurs and business owners, a prenup can be the difference between keeping your company and losing half of it. Without a prenup, a business started or grown during the marriage may be subject to division in divorce — even if only one spouse runs it.

In community property states like Texas, courts look at when the business was created, how it grew, and whether its value increased during the marriage. Under Texas Family Code §3.002, any property acquired during the marriage is presumed community property. That includes a business, even if the other spouse never worked a single day in it.

A prenup can address this by designating the business as separate property, specifying that any increase in value stays with the owning spouse, and preventing the non-owning spouse from claiming an ownership stake. It can also include provisions for how the business will be valued if a divorce occurs, which avoids the expensive and contentious process of hiring dueling appraisers in court.

In New Hampshire, absent a prenup, even a business owned before marriage is not automatically excluded from the marital estate. The case of In re Sarvela (2006) confirmed this. A family business passed down through generations could end up on the chopping block in a divorce proceeding without a prenup in place.

Scenario: Marcus and His Restaurant

Marcus opens a restaurant two years before marrying Dana. During the 12-year marriage, Dana supports the household while Marcus grows the restaurant into a chain worth $4 million. Without a prenup, a court in an equitable distribution state could award Dana a significant share of the business because her homemaking contributions enabled Marcus to focus on growth. With a prenup designating the restaurant as separate property, Marcus keeps it. The prenup might also require Marcus to buy Dana out of any marital contribution at a set formula, avoiding a courtroom fight.

Prenups and Debt Protection

Debt is one of the most overlooked reasons to get a prenup. If your partner walks into the marriage with $200,000 in student loans, medical bills, or credit card debt, a prenup can shield you from being held responsible for those obligations in a divorce.

A prenup can accomplish several things when it comes to debt. It can define which debts belong to each spouse, protect one spouse from the other’s business debts, and specify that any new debt incurred by one spouse during the marriage remains that spouse’s sole responsibility. Data from HelloPrenup shows that roughly 95% of couples who create a prenup choose to keep premarital debt separate.

There is an important limitation, though. A prenup is an agreement between two spouses. It does not bind creditors or third parties. If your spouse files for bankruptcy, a prenup may give you little or no protection from creditors who come after marital assets. The Federal Uniform Premarital Agreement Act makes prenups legally binding between spouses, but that legal protection does not extend to actions taken by creditors during bankruptcy proceedings.

Scenario: Priya and Jason

Priya is a physician with no debt. Jason has $180,000 in law school loans. They sign a prenup stating Jason’s student debt remains his sole responsibility. During the marriage, Jason also opens a credit card in his name and racks up $40,000 in charges. If they divorce, the prenup shields Priya from both the student loans and the credit card debt. But if Jason files for bankruptcy during the marriage, his creditors could potentially pursue jointly held assets regardless of the prenup.

Infidelity Clauses: Do They Work?

Infidelity clauses — sometimes called “bad boy” or “bad girl” clauses — are among the most talked-about provisions in prenups. Celebrities like Justin Timberlake and Jessica Biel reportedly have a clause that pays Biel $500,000 if Timberlake cheats. Catherine Zeta-Jones reportedly negotiated a $5 million “straying fee” in her prenup with Michael Douglas.

But the question every couple asks is: will a court enforce it?

The answer depends heavily on your state. In no-fault divorce states like California, infidelity clauses face a steep uphill battle. A Colorado court explicitly stated that a clause penalizing one party for “fault” during the marriage is “contrary to the public policy underlying the no-fault provisions for dissolution of marriage” and therefore unenforceable.

Even in states where infidelity clauses can be enforced, there are major practical hurdles. The cheating spouse would need to admit fault, or the other spouse would need to present witnesses, testimony, and documents proving the affair. If the language of the clause is vague about what counts as “cheating” — does an emotional affair count? a single text message? — the provision becomes even harder to enforce.

Some attorneys include infidelity clauses knowing they may not survive court scrutiny. The strategy is psychological, not legal: the clause makes the other spouse think twice about cheating, and it provides leverage during settlement negotiations. Even if the clause is unenforceable, the offending spouse may be more willing to negotiate favorably to avoid having evidence of their behavior presented in open court.

One critical safeguard: every prenup with an infidelity clause should include a strong severability clause. This ensures that if a court strikes down the infidelity provision, the rest of the prenup remains intact.

Nicole Kidman and Keith Urban’s “Cocaine Clause”

One of the most unusual prenup provisions in recent memory belongs to Nicole Kidman and Keith Urban. Before their 2006 wedding, they reportedly signed a prenup that paid Urban $600,000 to $900,000 for each year of marriage — but only if he stayed sober. This so-called “cocaine clause” was designed to protect Kidman from financial liability if Urban relapsed into substance abuse. When Kidman filed for divorce in September 2025, reports surfaced that Urban was demanding the full payout — roughly $11.4 million — claiming he had met the sobriety condition. Kidman reportedly felt the clause had been “slipped in” to protect Urban’s finances, not hers.

This case highlights how even a specific and detailed prenup provision can produce outcomes that neither party anticipated. It also shows that lifestyle clauses tied to verifiable conditions (like sobriety) may be more enforceable than vague infidelity provisions.

Famous Infidelity Clauses

Spousal Support Waivers

One of the most common provisions in a prenup is a waiver or limitation of spousal support (alimony). A couple can agree that neither party will seek alimony, or they can set specific dollar amounts and time limits. In some cases, the prenup may tie alimony to specific triggers, like remarriage or cohabitation.

But courts will not rubber-stamp every alimony waiver. Judges in many states review the clause for fairness at the time of divorce, not just at the time the agreement was signed. If circumstances have changed — one spouse became disabled, sacrificed a career to raise children, or cannot support themselves — a court may strike the waiver.

In the O’Daniel v. O’Daniel case in Tennessee, the wife developed a serious illness after the marriage. Even though the prenup waived alimony, the Court of Appeals reversed the trial court and voided the waiver because enforcing it would make the wife a “public charge.”

A recent New York case, J.M., broke new ground on spousal support waivers. The court held that for a self-represented party, the prenup must include the actual calculated amount of maintenance being waived. Without specific income figures and the mathematical formula showing what the party was giving up, there could be “no knowing waiver.” This decision effectively added a new requirement for prenups in New York involving self-represented spouses.

Mistakes to Avoid

Even a well-intentioned prenup can be destroyed by avoidable errors. Here are the most damaging mistakes couples make.

Using a DIY Approach

Online templates and DIY prenup services may save money upfront, but they can cost you everything later. A prenup that does not meet your state’s specific legal requirements — or uses vague, generic language — is a ticking time bomb. Steven Spielberg and Amy Irving’s napkin prenup is the most famous example of what happens when you skip the lawyers.

Hiding Assets or Lying About Finances

One of the fastest ways to void a prenup is to falsify or understate the value of assets. Full and honest financial disclosure is the foundation of every valid prenup. If it can be proven that asset values or other information on the agreement is incorrect, the entire agreement may be nullified.

Waiting Until the Last Minute

Presenting a prenup days before the wedding raises questions about duress. Courts want to see that both parties had adequate time to review the agreement, ask questions, negotiate terms, and consult with their own attorneys. Waiting until the last minute can also prevent full financial disclosure because there is simply not enough time to gather all the information.

Pressuring Your Partner to Sign

For a prenup to be valid, both parties must enter into it freely. Ultimatums — like “sign this or the wedding is off” — can support a duress claim later. The Florida case of Bates v. Bates shows what happens when one spouse manipulates the other through false claims and emotional pressure.

Making the Terms Too One-Sided

A prenup that leaves one spouse with nothing invites a court challenge. The Taha v. Elzemity case in New York is a clear example: a $20,000 lump sum to an unemployed mother of young children while the husband earned $300,000 annually was too extreme to survive scrutiny.

Ignoring State-Specific Rules

Every state has its own rules. In California, missing the 7-day waiting period can invalidate the agreement. In New York, failing to include maintenance calculations for self-represented parties can void the spousal support waiver. Not knowing your state’s requirements is a recipe for disaster.

Including Unenforceable Provisions Without a Severability Clause

If a prenup contains provisions that violate public policy — like child custody terms or penalties for adultery in a no-fault state — those provisions will be struck down. Without a severability clause, a court might throw out the entire agreement instead of just the offending section.

Do’s and Don’ts

Do’s

• ✅ Start early. Begin the prenup process at least three to six months before the wedding to avoid time pressure.
• ✅ Hire separate attorneys. Each spouse should have their own independent legal counsel who represents only their interests.
• ✅ Disclose everything. Provide complete, truthful financial statements listing all assets, debts, income, and liabilities.
• ✅ Include a severability clause. This protects the rest of the prenup if one provision is found unenforceable.
• ✅ Make sure both parties get something. Prenups that leave one spouse destitute or dependent on public assistance are ripe for invalidation.

Don’ts

• ❌ Don’t include child custody provisions. Courts decide custody based on the child’s best interests at the time of divorce, not pre-made agreements.
• ❌ Don’t rush. A prenup signed the night before the wedding while one party is under the influence of alcohol is a guaranteed challenge.
• ❌ Don’t lie. Falsifying financial information voids the agreement and may constitute fraud.
• ❌ Don’t skip independent legal review. Spielberg and Irving’s napkin prenup cost Spielberg $100 million because Irving had no attorney.
• ❌ Don’t assume your prenup is bulletproof. Circumstances change. A prenup that was fair in 2010 might not be fair in 2026 if one spouse becomes disabled or economically dependent.

Pros and Cons of Prenuptial Agreements

Pros

• Asset protection. A prenup keeps premarital assets, inheritances, and business interests out of the marital property pool.
• Debt protection. It shields one spouse from the other’s premarital and marital debts.
• Control over outcomes. Instead of leaving asset division to a judge’s discretion, the couple decides the terms.
• Faster divorce process. A valid prenup can simplify proceedings and reduce legal fees.
• Forces financial transparency. The disclosure process encourages honest conversations about finances before marriage.

Cons

• Emotional tension. Bringing up a prenup can create conflict and distrust before the marriage even starts.
• Cost. Hiring two separate attorneys to draft and review a prenup is not cheap, typically running from $2,000 to $10,000 or more.
• Not bulletproof. Even a well-drafted prenup can be challenged and potentially thrown out if circumstances change.
• Cannot cover everything. Child support, custody, and certain lifestyle provisions may not be enforceable.
• Power imbalance. If one spouse has far more resources, the other may feel pressured to agree to unfavorable terms, even with their own attorney.

FAQs

Can a prenup be thrown out in court?
Yes. A prenup can be invalidated if it was signed under duress, contains unconscionable terms, or lacks full financial disclosure from both parties.

Does every state enforce prenups the same way?
No. Each state has its own laws. Twenty-six states follow the UPAA, while others like Massachusetts use their own fairness standards.

Can a prenup waive child support?
No. Child support is a right belonging to the child. Courts will not enforce any prenup provision that waives or limits child support.

Can you put an infidelity clause in a prenup?
Yes, but enforcement is uncertain. Many no-fault divorce states consider infidelity clauses contrary to public policy and refuse to enforce them.

Do both parties need their own lawyer for a prenup?
No, but it is strongly recommended. Without independent counsel, the disadvantaged party has a stronger argument to invalidate the agreement.

Can a prenup protect my business?
Yes. A prenup can designate a business as separate property and protect it from division in divorce proceedings.

Can a prenup protect me from my spouse’s debt?
Yes, between spouses. A prenup assigns debt responsibility, but it does not protect against third-party creditors in a bankruptcy.

Is a prenup signed the day before the wedding valid?
No, in many cases. Courts in most states view last-minute signing as a strong indicator of duress, especially if the other party had no time for legal review.

Can a prenup be changed after marriage?
Yes. Couples can modify their prenup through a postnuptial agreement, as long as both parties agree and the new terms meet legal requirements.

Do prenups expire?
No. Prenuptial agreements do not have an expiration date unless the agreement itself includes a sunset clause with a specific end date.

Can a handwritten prenup hold up in court?
Yes, in theory, as long as it meets all legal requirements. But the Spielberg napkin case shows that informal agreements invite challenges and rarely survive scrutiny.

Is a prenup worth it if we do not have many assets?
Yes. A prenup also addresses debt protection, future inheritance, and spousal support — issues that affect couples at every income level.