International relationships: prenups when one partner lives abroad or has foreign assets

Cross‑border relationships bring added complexity to prenuptial planning. Different legal systems treat nuptial agreements in different ways. When one partner lives abroad or holds assets overseas you must consider jurisdiction choice, choice of law, enforceability in multiple countries, tax consequences and practical steps to secure certainty. This guide explains the legal landscape in England and Wales practical drafting strategies and a step‑by‑step checklist to help couples create robust prenups that work across borders.

Why international factors matter for prenups

A prenup that looks clear under English law can prove ineffective if a foreign court takes a different approach to enforceability or applies a different law to determine matrimonial property. Issues commonly arise about:

– which court has jurisdiction to hear disputes

– which country’s law governs property and financial claims

– recognition and enforcement of orders across borders

– tax consequences for cross‑border transfers or settlements

– practical evidential and procedural differences such as notarisation, translation and local formalities

Planning for these issues reduces the risk of unexpected results and costly litigation.

Legal position in England and Wales: key principles

England and Wales treat prenuptial agreements as a significant factor but not automatically binding. Since Radmacher v Granatino courts normally respect nuptial agreements entered into freely, with full financial disclosure and independent legal advice, unless enforcing them would result in unfairness. Where one partner lives abroad or assets sit overseas, English courts will also consider public policy and international private law rules when deciding whether to apply or give effect to a foreign element in the agreement.

Choice of jurisdiction and choice of law clauses

Include clear jurisdiction and governing law clauses in the prenup. Two separate but related choices matter:

– jurisdiction clause: identifies which courts the parties agree will resolve disputes (for example, English courts).

– choice of law clause: specifies which legal system governs the interpretation and operation of the prenup (for example, English law).

A well drafted prenup usually seeks to designate English law as governing and to give exclusive jurisdiction to English courts where appropriate. That choice increases the likelihood English courts will apply the agreement when disputes arise in England and Wales. However courts in other countries may not recognise these clauses or may themselves have statutory rules that allocate jurisdiction differently.

Frontier tests and forum non conveniens

Even with jurisdiction clauses, some foreign courts may decline to enforce an agreement on public policy grounds or because local compulsory rules prevail. Conversely, an English court could refuse to exercise jurisdiction if a more appropriate forum exists elsewhere in exceptional cases. You should weigh the benefits of choosing English jurisdiction against practicalities such as where assets sit where children live and which legal system better protects your objectives.

Recognition and enforcement abroad

If you want a prenup to operate across jurisdictions check whether the foreign country generally recognises such agreements. Many common law jurisdictions respect prenups, but civil law countries sometimes view them as matrimonial property contracts and may apply mandatory local rules. For example some countries set statutory rules on marital property regimes that cannot be contracted out of. Research recognition in each relevant country and obtain advice from local family law specialists where necessary.

Property located abroad and conflict of laws

Conflict of laws determines which legal rules apply to property disputes. For immovable property such as land, courts usually apply the law of the place where the property sits (lex situs). That means a prenup governed by English law might not override a foreign law requirement about land ownership. For movable assets such as bank accounts shares or personal property, the applicable law may differ depending on the jurisdiction and the asset type. Ensure your prenup addresses foreign real estate specifically and includes mechanisms to comply with local formalities.

Drafting cross‑border asset clauses

Draft explicit clauses for foreign assets including:

– a schedule of foreign assets with jurisdictional detail and registration numbers where relevant

– treatment of real estate governed by lex situs and any local consent or registration required for the prenup to affect title

– rules for foreign bank accounts and investment holdings including currency, tax residency and access arrangements

– agreed valuation methods for foreign businesses or illiquid assets and the panel of acceptable valuers experienced in the relevant jurisdictions

– a mechanism for updating asset schedules when parties acquire significant new overseas assets

These clauses show awareness of cross‑border risks and reduce ambiguity.

Tax, trusts and estate planning issues

Cross‑border tax consequences can affect the desirability and practicality of prenup provisions. Transfers between spouses, buyouts and trust settlements can trigger income tax capital gains tax inheritance tax stamp duty or similar foreign taxes. Consider:

– the tax treatment of any proposed transfer or buyout in each relevant jurisdiction

– whether moving assets into trusts or family companies affects tax and protects against local compulsory claims

– how wills and estate planning documents must align with the prenup to avoid conflict at death

– pension rules that may vary by country and require specialist actuarial advice

Work with tax advisers in both jurisdictions to model the tax cost of different settlement structures.

Formalities, notarisation and translations

Some countries require notarisation, apostilles or local formalities to give weight to foreign documents. Translate the prenup into the local language and obtain certified translations where needed. Consider witnessing and notarising signatures in the foreign country and provide a clause confirming parties understand translations and local legal effects. These practical steps make recognition and enforcement smoother.

Full disclosure and independent legal advice across borders

Each party should receive independent legal advice from a solicitor qualified in the jurisdiction the party lives in or from counsel specialising in international family law. Courts regard evidence of independent advice highly when assessing fairness and voluntariness. Full financial disclosure must include foreign bank accounts, businesses, trusts and any legal proceedings abroad. Provide certified copies of foreign documents and translations where applicable.

Consider parallel or dual agreements

In complex cases parties sometimes create two documents: an English law governed prenup and a counterpart governed by the foreign law tailored to local legal requirements. Draft both consistently and include cross‑references to avoid contradictions. Using dual agreements helps ensure local enforceability while preserving the parties’ intentions in England and Wales.

Pensions and cross‑border retirement rights

International pension rights complicate settlements. Different countries use varied pension sharing or offset rules. Obtain actuarial reports for foreign pensions and include clear provisions in the prenup about pension sharing, offsets or alternative arrangements. Where possible agree formulas rather than rigid lump sums so the parties can adjust to currency fluctuation and changes in pension law.

Children, public policy and welfare considerations

Courts place children’s welfare above private agreements. If children live in different countries consider which forum will make welfare decisions and include pragmatic provisions for interim support and schooling. A prenup cannot oust a court’s duty to protect children, and some jurisdictions will set aside clauses that unduly restrict child maintenance or custody rights.

Dispute resolution and enforcement mechanisms

Include dispute resolution clauses that require negotiation mediation or arbitration before litigation. Arbitration can offer finality and international enforceability under the New York Convention for arbitral awards. However family law issues involving children remain unsuitable for arbitration in many jurisdictions. Tailor dispute resolution options to the likely scope of disputes and consider an arbitration clause for financial claims that do not affect children directly.

Practical checklist for international prenups

– identify all relevant jurisdictions where spouses live hold assets pay tax or raise children

– choose governing law and jurisdiction clauses thoughtfully and explain reasons in the schedule

– list foreign assets in a detailed schedule with registration references, valuations and legal descriptions

– obtain local legal advice in each country where enforcement might matter and retain certificates of advice

– include valuation methods, acceptable valuers and tie‑breaker mechanisms for cross‑border assets

– plan tax and estate implications with advisers in each jurisdiction and co‑ordinate wills, trusts and beneficiary nominations

– consider parallel local agreements or notarisation and apostille where required by foreign law

– translate the agreement into the local language and obtain certified translations of key documents

– include dispute resolution steps such as negotiation and mediation and consider arbitration for financial disputes excluding children issues

– schedule regular reviews and trigger events such as relocation, business sale or acquisition of major foreign assets

Common pitfalls and how to avoid them

– relying solely on English law where foreign mandatory rules apply: check local mandatory rules especially for land and matrimonial property regimes

– failing to translate or notarise documents: comply with local formalities to improve enforceability abroad

– overlooking tax consequences: consult tax specialists early to avoid unexpected liabilities

– inadequate disclosure of foreign assets or trusts: produce certified evidence and translations to demonstrate full disclosure

– using inconsistent dual agreements: ensure parallel documents align precisely and cross‑reference key terms

When to seek specialist international family law advice

Obtain specialist advice when you or your partner:

– live in different countries or have changing residence status

– hold significant assets in more than one jurisdiction including real estate, business interests or trusts

– face differing matrimonial property regimes, for example community property systems or mandatory forced heirship rules

– expect to rely on enforcement of financial orders outside England and Wales

An international family law specialist will co‑ordinate cross‑border advisers and draft wording that maximises the prenup’s effectiveness.

Conclusion

Prenups for international relationships require careful legal and practical planning. Choose governing law and jurisdiction deliberately, document foreign assets precisely, obtain local legal and tax advice and comply with foreign formalities. Use clear valuation mechanisms dispute resolution steps and review triggers. Thoughtful cross‑border drafting does not guarantee universal enforcement, but it significantly reduces risk and increases the likelihood that courts or tribunals will respect the parties’ intentions. For complex situations consult us as solicitors experienced in international family law to create a tailored solution that protects your interests across jurisdictions.

At Alexander JLO we have many years of experience of dealing with all aspects of family law and will be happy to discuss your case in a free no obligation consultation. Why not call us on +44 (0)20 7537 7000, email us at info@london-law.co.uk or get in touch via the contact us button and see what we can do for you?

This blog was prepared by Peter Johnson on 13th November 2025 and is correct at the time of going to press. With over forty years of experience in almost all areas of law Peter is happy to assist with any legal issue that you have. He is widely regarded as one of London’s leading divorce lawyers. His profile on the independent Review Solicitor website can be found Here. To follow up on any of the above please contact Guy Wilton of our family department. Guy has wide experience of acting for the firm’s clients, their family and their businesses. Guy’s experience as a lawyer started in the Northern and Welsh Circuits, including the Liverpool Courts, where he represented numerous clients after being called to the Bar, before opting to join Alexander JLO in 2017 and qualifying as a solicitor in 2024. He is a highly experienced family lawyer with a particular interest in financial remedy proceedings and child contact disputes.

Guy’s profile on the independent Review Solicitor website can be viewed here.