Healthcare billionaire Miguel "Mike" Fernandez, 73, filed to divorce his wife of 25 years in Miami-Dade County, asking a Florida court to enforce a 2001 prenuptial agreement that caps her recovery at roughly $1 million — about 0.1% of his estimated $1 billion fortune. Under Fla. Stat. § 61.079, the case will turn on whether the agreement was signed voluntarily with fair financial disclosure.
Key Facts
| Item | Detail |
|---|---|
| What happened | Billionaire filed for divorce and moved to enforce a 2001 prenup capping the spouse's recovery near $1 million |
| When | Divorce filed 2025; a hearing on the prenup's validity occurred in June, per AOL/Yahoo Entertainment |
| Where | Miami-Dade County Circuit Court, Florida |
| Who's affected | Mike Fernandez, 73, and his wife of 25 years; the ruling guides all Florida prenup disputes |
| Key statute | Fla. Stat. § 61.079 (Florida Uniform Premarital Agreement Act) |
| Impact | Estate reportedly valued near $1 billion; the prenup would limit the spouse to ~0.1% |
Why this matters legally
A Florida prenuptial agreement is enforceable only if it was signed voluntarily and was not the product of fraud, duress, coercion, or overreaching, under Fla. Stat. § 61.079(7). This case squarely tests those requirements against a 25-year marriage and a fortune that grew enormously after the agreement was signed in 2001.
The central legal issue reported in the June hearing was whether the wife had independent legal advice — or a meaningful opportunity to obtain it — before signing. Florida law does not require that each party actually hire a lawyer. It requires that the agreement not be unconscionable, that there be fair and reasonable disclosure of assets, and that the challenging party had adequate knowledge of the other's finances or waived that disclosure in writing.
Crucially, Florida courts assess voluntariness and disclosure as of the signing date, not the divorce date. A billionaire's later wealth does not retroactively invalidate a prenup signed when he was worth far less. The wife's strongest arguments therefore focus on the circumstances of 2001, not the size of today's estate.
How Florida law handles this
Florida adopted the Uniform Premarital Agreement Act, codified at Fla. Stat. § 61.079, effective in 2007. Under subsection (7), a premarital agreement is not enforceable if the challenging party proves it was not executed voluntarily, or that it was the product of fraud, duress, coercion, or overreaching. The statute also bars enforcement where the agreement was unconscionable when signed and the party was not provided fair disclosure, did not waive disclosure, and had no adequate knowledge of the other party's finances.
The burden of proof rests on the spouse challenging the agreement — here, the wife. That is a demanding standard. Florida case law, including Casto v. Casto and its progeny, establishes that a prenup can be set aside for fraud, duress, or overreaching, or where disclosure was so inadequate that the challenging party lacked a general knowledge of the marital assets. A short timeline before the wedding — the reported "pop-up" ceremony — can support a duress argument, but timing alone rarely voids an agreement.
Asset disclosure is often decisive. If Fernandez disclosed his 2001 net worth in the agreement or an attached schedule, the wife's disclosure argument weakens considerably. If disclosure was omitted and not waived, the agreement faces real exposure. Florida also allows courts to award temporary support and attorney's fees during litigation under Fla. Stat. § 61.16, even while a prenup's validity is contested, so a spouse is not left without resources during the fight.
Florida is an equitable distribution state under Fla. Stat. § 61.075. If the court strikes the prenup, the wife would not automatically receive half of a $1 billion estate. She would receive an equitable — meaning fair, not necessarily equal — share of the marital assets accumulated during the marriage. Property Fernandez owned before 2001, plus its passive appreciation, could remain his separate, non-marital property.
Practical takeaways
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Get independent counsel before signing any prenup. Florida does not require it, but having your own attorney review the agreement is the single strongest defense against a later duress or overreaching claim under Fla. Stat. § 61.079(7).
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Insist on full financial disclosure. Attach a schedule of assets, debts, and income to the agreement. Fair and reasonable disclosure — or a signed written waiver of it — protects both parties and is a recurring flashpoint in Florida prenup litigation.
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Avoid signing under time pressure. A prenup presented on or near the wedding day invites duress arguments. Negotiate and sign weeks in advance, ideally 30 days or more, with documented time to review.
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Understand what a prenup can and cannot cap. In Florida, a prenup can waive alimony and define property division, but it cannot bind child support or custody, which courts decide based on the child's best interests under Fla. Stat. § 61.13.
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Revisit agreements after major wealth changes. A prenup signed at modest net worth may feel unfair decades later, but it generally holds. If circumstances change dramatically, a postnuptial agreement can update the terms by mutual consent.
If you are considering a prenuptial agreement or facing a divorce where one is in dispute, an experienced Florida family law attorney can evaluate the enforceability of your specific agreement and protect your interests. Divorce.law connects you with attorneys who handle these high-stakes matters across Florida and beyond.
This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.