Prenup & Marriage Contract Navigator
Prenup: United States + Spain
Case complexity: medium. The contract has to work across several legal systems at once: United States, Spain.
Which contract, and where to sign it
United States: Written and signed; there is no uniform standard — the UPAA/UPMAA are adopted by most but not all states (New York, Massachusetts, Ohio and others follow their own law): voluntariness, full disclosure and time to reflect are required almost everywhere.
Spain: Escritura pública before a notary; before or after the wedding, registered in the civil registry.
Several legal systems are involved — one document will not cover them all. The working construction: an anchor contract in the principal jurisdiction plus mirror texts where the key assets sit, backed by local counsel opinions.
Choice of applicable law
In the EU, fix the choice of law inside the contract (Regulation 2016/1103): the law of either spouse’s citizenship or habitual residence. Without a choice, the regime follows the first common residence — and migrates with you unpredictably.
Spain: under Rome III you can also pre-select the law applicable to the divorce itself — it belongs in the same package.
English and US courts will judge the contract by their own rules whatever law it names — for these jurisdictions the signing procedure decides, not the choice-of-law clause.
What you can fix in it
United States: Assets and alimony (waivable in many states absent unconscionability); child support and custody cannot be locked in.
Spain: Election and tailoring of the regime, compensation clauses; mind the regional systems (Catalonia and the Balearics run their own rules).
What gives the contract its force
Full asset disclosure annexed to the contract — the main anchor against future challenge.
Independent counsel for each side; one adviser for both is the classic line of attack.
Translations and legalisation: every version with a notarised translation and apostille for its jurisdiction of use.
What to read next
Deep dive: cross-border prenups
Divorce navigator: what happens without a contract
Property division in a cross-border divorce
What to watch out for
Several legal systems mean a package, not one text: an anchor contract + mirrors + local opinions.
FAQ
Which marriage contract should a United States + Spain couple sign, and where?
United States: Written and signed; there is no uniform standard — the UPAA/UPMAA are adopted by most but not all states (New York, Massachusetts, Ohio and others follow their own law): voluntariness, full disclosure and time to reflect are required almost everywhere. Spain: Escritura pública before a notary; before or after the wedding, registered in the civil registry. Several legal systems are involved — one document will not cover them all. The working construction: an anchor contract in the principal jurisdiction plus mirror texts where the key assets sit, backed by local counsel opinions.
Which law should the contract choose?
In the EU, fix the choice of law inside the contract (Regulation 2016/1103): the law of either spouse’s citizenship or habitual residence. Without a choice, the regime follows the first common residence — and migrates with you unpredictably. Spain: under Rome III you can also pre-select the law applicable to the divorce itself — it belongs in the same package. English and US courts will judge the contract by their own rules whatever law it names — for these jurisdictions the signing procedure decides, not the choice-of-law clause.
What can the contract fix?
United States: Assets and alimony (waivable in many states absent unconscionability); child support and custody cannot be locked in. Spain: Election and tailoring of the regime, compensation clauses; mind the regional systems (Catalonia and the Balearics run their own rules).
What gives the contract force?
Full asset disclosure annexed to the contract — the main anchor against future challenge. Independent counsel for each side; one adviser for both is the classic line of attack. Translations and legalisation: every version with a notarised translation and apostille for its jurisdiction of use.
Can the contract be signed after the wedding (postnup)?
United States: State-dependent: some states require separate consideration and scrutinise postnups harder than prenups. Spain: Capitulaciones can be concluded and amended during the marriage without restriction.
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This is a first-pass orientation, not legal advice. The rules are simplified; the contract itself is drafted by a lawyer for your couple.
If you have questions or need a consultation, our experts will be glad to help.