St. Augustine · Jacksonville · St. Johns County & Northeast Florida

Postnuptial Agreement Attorney St. Augustine, FL

Already married and need to protect your assets? A postnuptial agreement can define financial terms, safeguard property, and provide clarity for both spouses.

Schedule a Consultation Call (904) 392-4573
Home » Practice Areas » Postnuptial Agreements

Postnuptial Agreements in Florida: Protecting Your Marriage and Your Assets


A postnuptial agreement is a legally binding contract between spouses that is executed after the marriage has already taken place. Like a prenuptial agreement, a postnup defines how assets, debts, and spousal support will be handled in the event of divorce or death. Unlike a prenup, it is created within the context of an existing marriage — which brings unique legal considerations and heightened judicial scrutiny.

Christine Leonard is a trial-tested family law attorney who drafts postnuptial agreements that protect her clients while meeting Florida's strict enforceability standards. She understands the fiduciary duties between spouses and crafts agreements that courts will uphold.

Legal Requirements for Florida Postnuptial Agreements


While Florida's Uniform Premarital Agreement Act (F.S. 61.079) specifically governs prenuptial agreements, postnuptial agreements are enforceable under Florida contract law and case law precedent. Courts apply the following requirements:

Written agreement. The postnuptial agreement must be in writing and signed by both spouses. Oral agreements between spouses regarding property division are not enforceable.

Voluntary execution. Both spouses must enter the agreement freely, without coercion, duress, or undue influence. Given the power dynamics that can exist within a marriage, courts examine voluntariness more carefully than with prenups.

Full and fair financial disclosure. Each spouse must provide complete disclosure of all assets, income, debts, and financial obligations. Because spouses owe each other a fiduciary duty of good faith and fair dealing, any concealment of finances can invalidate the agreement entirely.

Not unconscionable. The agreement cannot be grossly unfair or one-sided. Florida courts will refuse to enforce provisions that would leave one spouse destitute while the other retains substantial wealth.

Independent legal counsel. While not an absolute statutory requirement, having each spouse represented by their own attorney is strongly recommended and significantly strengthens enforceability.

How Postnuptial Agreements Differ from Prenups


The most significant difference between prenuptial and postnuptial agreements is the legal standard applied by Florida courts:

Fiduciary duty. Once married, spouses owe each other a fiduciary duty — a legal obligation of trust, good faith, and fair dealing. This duty does not exist between unmarried partners signing a prenup. Because of this heightened duty, courts scrutinize postnuptial agreements more closely for fairness and full disclosure.

Burden of proof. With a prenuptial agreement, the party challenging the agreement typically bears the burden of proving it should be invalidated. With a postnuptial agreement, the spouse seeking to enforce the agreement may bear the burden of proving it was fair and entered into properly.

Consideration. A prenup's consideration is the marriage itself. A postnup requires separate consideration — something of value exchanged between the spouses, such as mutual promises regarding property or continued commitment to the marriage.

When Does a Postnuptial Agreement Make Sense?


There are many legitimate reasons to pursue a postnuptial agreement during a marriage:

No prenup was signed. Many couples do not sign a prenuptial agreement before marriage, either because they did not think it was necessary or because the timing did not allow it. A postnup provides a second opportunity to establish financial protections.

Significant change in financial circumstances. If one spouse starts a business, receives a large inheritance, comes into a financial windfall, or experiences a significant increase in income, a postnup can clarify how those assets will be treated.

Marital reconciliation. When a couple reconciles after separation or a period of marital difficulty, a postnuptial agreement can set clear expectations and provide a foundation for rebuilding trust. Some couples use postnups as part of a reconciliation plan.

Estate planning considerations. A postnup can complement estate planning documents, particularly in blended families where one or both spouses have children from prior relationships and want to ensure specific assets pass to those children.

Protecting a family business. If one spouse becomes involved in a family business during the marriage, a postnup can define how business interests will be treated in a potential divorce, protecting both the business and the non-owner spouse's interests.

Enforceability Challenges


Postnuptial agreements face greater scrutiny than prenups. The most common grounds for challenge include:

Breach of fiduciary duty. If one spouse failed to disclose assets, misrepresented their financial situation, or exerted undue influence over the other spouse, the agreement may be invalidated.

Lack of independent counsel. When one spouse did not have their own attorney review the agreement, courts may find the agreement was not entered into with full understanding of its implications.

Unconscionability. An agreement that is grossly unfair at the time of enforcement — even if it appeared fair when signed — may be struck down by the court.

Christine Leonard anticipates these challenges and builds postnuptial agreements with comprehensive safeguards: detailed financial disclosures, clear recitals of voluntariness, independent counsel provisions, and balanced terms that courts will uphold.

It’s Not Too Late to Protect Your Assets.

A well-drafted postnuptial agreement can provide financial clarity and security for both spouses. Christine Leonard crafts agreements designed to hold up under the heightened scrutiny Florida courts apply to marital contracts.

Schedule Your Consultation

Frequently Asked Questions: Postnuptial Agreements in Florida

Are postnuptial agreements enforceable in Florida?

Yes. Florida courts enforce postnuptial agreements, though they are subject to stricter scrutiny than prenups due to the fiduciary duty between spouses. The agreement must be voluntary, include full financial disclosure, and not be unconscionable.

What is the difference between a prenup and a postnup?

The primary difference is timing. A prenup is signed before marriage; a postnup is signed after. Postnups face heightened scrutiny because of the fiduciary duties that exist between spouses. Both can address property rights, alimony, and asset protection.

When does a postnuptial agreement make sense?

A postnup makes sense when circumstances have changed since the marriage — a new business, a large inheritance, a financial windfall, marital reconciliation after difficulty, or when no prenup was signed and the couple wants to formalize financial expectations.

Can a postnuptial agreement address alimony?

Yes. A postnup can waive, limit, or set terms for alimony. However, the court closely examines alimony provisions for fairness. Contact Leonard Legal at (904) 392-4573 to discuss your situation.

Discuss Your Postnuptial Agreement →