A postnuptial agreement can change important financial rights after a couple is already married. It might determine whether property is separate or community, address ownership of a business, establish financial obligations, or affect what happens if the marriage ends.
But what if you signed because your spouse threatened divorce, controlled the finances, withheld information, or pressured you until you felt you had no realistic choice?
In California, saying “I felt pressured” does not automatically invalidate a postnup. Courts look closely at how the agreement was negotiated, what each spouse knew, and whether one spouse obtained an unfair advantage.
Why Are Postnups Different From Prenups?
Timing matters.
A premarital agreement is negotiated before the parties become spouses. A postnuptial agreement is negotiated after marriage, when California law already imposes fiduciary duties between spouses.
Under Family Code section 721, spouses owe each other the highest good faith and fair dealing and may not take unfair advantage of one another.
That relationship can subject postnuptial agreements to greater scrutiny than ordinary contracts between unrelated people.
Did One Spouse Receive an Unfair Advantage?
One of the first important questions is what the agreement actually did.
California courts have held that when an interspousal transaction gives one spouse an unfair advantage over the other, a presumption of undue influence can arise.
An obvious example might involve one spouse transferring valuable property to the other for little or nothing in return. A comprehensive postnup, however, may give both spouses different benefits.
The California Court of Appeal’s decision in In re Marriage of Burkle illustrates the distinction. The court upheld a postmarital agreement where both spouses received advantages, both had independent lawyers, and extensive financial information was available.
The fact that one spouse benefits from an agreement therefore does not automatically make the agreement invalid.
What Does “Signed Under Pressure” Actually Mean?
Marriage itself can create emotional pressure during negotiations. A spouse may fear divorce, financial instability, or disruption to the family.
Courts generally need more than the fact that the decision was difficult or stressful.
The circumstances surrounding the signature can matter. Relevant questions may include whether one spouse was given meaningful time to consider the agreement, whether threats or improper pressure were used, whether the spouse understood the consequences, and whether there was a genuine opportunity to obtain advice.
California cases examining undue influence have considered factors such as the relative strength and vulnerability of the parties and pressure to complete an agreement quickly.
Did You Have Your Own Lawyer?
Independent legal representation can be important evidence when a postnup is challenged.
A lawyer can explain what rights a spouse is giving up, identify unfavorable provisions, request financial information, and negotiate changes.
Having separate attorneys does not automatically make every postnup enforceable. Spouses still owe fiduciary duties to each other.
But independent counsel can make it considerably harder to argue later that a spouse did not understand the agreement or lacked an opportunity to protect their interests. California courts have considered independent representation important when evaluating whether postmarital agreements resulted from undue influence.
Was Financial Information Hidden?
Pressure is not the only issue.
California spouses have important disclosure obligations arising from their fiduciary relationship. If one spouse controls the family’s finances, businesses, investments, or other assets, incomplete or misleading information can become highly significant.
A court may examine what financial information was provided, whether documents were available, and whether one spouse concealed or misrepresented material facts.
That is especially important when the postnup changes the character or ownership of valuable assets.
Importance of Legal Guidance
Postnup disputes often involve much more than whether someone voluntarily placed a signature on a page.
Men’s Legal Center can help California husbands and fathers review postnuptial agreements, financial disclosures, negotiation records, and the circumstances surrounding execution to determine whether an agreement may be enforceable or subject to challenge.