Florida Prenup With an Argentine Spouse or Property in Argentina: Convenciones Matrimoniales, Comunidad de Ganancias and Disclosure (2026)

By Nadia Pazos, Family Law Attorney, Pazos Law Group · Updated October 17, 2026

An Argentine fiancé(e), an apartment in Buenos Aires, a family company or an inheritance in Argentina, or a couple who will marry in Argentina and live in Miami: each raises the same question of how a Florida prenup and Argentine law fit together. Pazos Law Group, a family law firm in Coral Gables serving Miami-Dade, Broward and Palm Beach counties, drafts and reviews Florida prenups for couples with Argentine ties, in English or Spanish: (305) 482-1262.

Quick Answer

One of us is Argentine or owns property in Argentina. What do we need?

A Florida prenup needs only a writing signed by both parties (Fla. Stat. § 61.079(3)) and can cover property “whenever and wherever acquired or located” (§ 61.079(4)(a)1.), including in Argentina. Argentina’s equivalent, the convención matrimonial, is narrower: before the wedding it may cover only the four matters listed in the Código Civil y Comercial, art. 446, any other agreement about the couple’s property “es de ningún valor” (art. 447), and it must be made by escritura pública before the marriage (art. 448). Without an option, Argentine law applies the comunidad de ganancias (art. 463), and Argentina’s conflict-of-laws rule looks to the couple’s first marital domicile (art. 2625). List the Argentine assets, with values, in the Florida disclosure schedules, and ask a lawyer in Argentina to confirm how the agreement will be treated there.

Two Systems, Two Formalities

Florida: a premarital agreement “must be in writing and signed by both parties,” and “becomes effective upon marriage of the parties.” § 61.079(3), (5)
Argentina, what a convention may cover: “Antes de la celebración del matrimonio los futuros cónyuges pueden hacer convenciones que tengan únicamente los objetos siguientes: a) la designación y avalúo de los bienes que cada uno lleva al matrimonio; b) la enunciación de las deudas; c) las donaciones que se hagan entre ellos; d) la opción que hagan por alguno de los regímenes patrimoniales previstos en este Código.” (art. 446)
Argentina, everything else: “Toda convención entre los futuros cónyuges sobre cualquier otro objeto relativo a su patrimonio es de ningún valor.” (art. 447)
Argentina, form: “Las convenciones matrimoniales deben ser hechas por escritura pública antes de la celebración del matrimonio, y sólo producen efectos a partir de esa celebración y en tanto el matrimonio no sea anulado.” For the choice of regime to bind third parties, it “debe anotarse marginalmente en el acta de matrimonio.” (art. 448)

The difference matters in practice. A Florida prenup can also address spousal support (§ 61.079(4)(a)4.) and rights at death (§ 61.079(4)(a)3.); an Argentine pre-wedding convention cannot reach matters outside art. 446. Whether an Argentine notary, registry or court will give effect to the broader Florida terms for property in Argentina is a question a lawyer in Argentina should confirm, ideally before the wedding. Pazos Law Group advises on Florida law.

Which Law Governs: The First Marital Domicile

Argentina’s own conflict-of-laws rule answers this: “Las convenciones celebradas con anterioridad al matrimonio se rigen por el derecho del primer domicilio conyugal; las posteriores se rigen por el derecho del domicilio conyugal al momento de su celebración. En defecto de convenciones matrimoniales, el régimen de bienes se rige por el derecho del primer domicilio conyugal.” The same article excepts what, being “de estricto carácter real,” is prohibited by the law where the property is located (art. 2625).

For a couple whose first home together after the wedding is in Florida, that rule points to Florida law for a convention made before the marriage. For a couple who settle first in Argentina, it points to Argentine law. Where the couple will live first is therefore worth deciding, and writing down, before the agreement is drafted.

The Default: Argentina’s Comunidad de Ganancias

“A falta de opción hecha en la convención matrimonial, los cónyuges quedan sometidos desde la celebración del matrimonio al régimen de comunidad de ganancias reglamentado en este Capítulo.” (art. 463)

Under that regime, each spouse’s own property (bienes propios) includes “los bienes de los cuales los cónyuges tienen la propiedad, otro derecho real o la posesión al tiempo de la iniciación de la comunidad” and property acquired during the marriage “por herencia, legado o donación” (art. 464, a) and b)). Couples who opt for separation of property keep control of their own assets: “cada uno de los cónyuges conserva la libre administración y disposición de sus bienes personales” (art. 505).

After the Wedding

Argentina allows a change of regime by agreement, but not right away: “Esta convención puede ser otorgada después de un año de aplicación del régimen patrimonial, convencional o legal, mediante escritura pública” (art. 449). Florida also has an after-the-wedding option: a postnuptial agreement. See Florida postnuptial agreements.

A Practical Checklist for Couples With Argentine Ties

List every Argentine asset and debt, with values, in the Florida disclosure schedules.
Decide where your first marital home will be, because art. 2625 turns on it.
If the regime must also work in Argentina, ask a lawyer in Argentina whether an escritura pública choosing separación de bienes (art. 446, d) is also needed, and whether it must be noted on the marriage record (art. 448).
Each party should have their own lawyer review the Florida agreement before signing.

Frequently Asked Questions

Is a Florida prenup valid in Argentina?

That is a question of Argentine law for a lawyer in Argentina. Argentina’s rule looks to the law of the first marital domicile for conventions made before the marriage (art. 2625), and its own pre-wedding conventions are limited to the matters in art. 446.

We are marrying in Argentina but will live in Miami. Which prenup do we need?

Many couples sign a Florida prenup for their life in Florida and ask an Argentine lawyer whether an Argentine convention is also needed for property there. A Florida agreement must be in writing and signed by both parties (§ 61.079(3)).

Does an inheritance in Argentina become shared property?

Under Argentina’s default regime, property received “por herencia, legado o donación” is each spouse’s own (art. 464, b). A Florida prenup can also define how an inheritance and its growth are treated.

Primary Sources

Código Civil y Comercial de la Nación (Ley 26.994), texto actualizado, InfoLEG — arts. 446–449, 463–464, 505, 2625.
Fla. Stat. § 61.079 — premarital agreements.

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Florida Prenups With Argentine Ties

Tell us your wedding date, where the Argentine property is, and whether a convención matrimonial already exists. Nadia Pazos will follow up personally — confidential, bilingual EN/ES. Prefer to call? (305) 482-1262.

The information on this page is for general informational purposes only and does not constitute legal advice, and it does not address the law of any state or country other than Florida except as expressly noted. Reading or sharing this content does not create an attorney-client relationship with Pazos Law Group. Florida law and the application of statutes change over time; please consult a licensed Florida attorney about your specific situation, and counsel licensed in any other state or country whose law may apply.