English courts do not automatically recognize or enforce prenuptial agreements, whether foreign or domestic. Instead, they apply a three-part test established in the 2010 Radmacher v Granatino Supreme Court decision: (1) if the agreement was freely entered into, (2) if both parties had a full appreciation of its implications, and (3) if it would be fair to uphold it. This means that even a well-drafted US prenup may not be fully binding if an English court deems its terms unfair, particularly if it leaves one party in financial need or fails to adequately provide for children, or if the circumstances have changed significantly since it was signed.
The "fairness" criterion is crucial and can lead to an English court upholding an agreement in full, setting it aside entirely, or making adjustments to ensure a just outcome. Factors influencing fairness include whether there was full financial disclosure by both parties, independent legal advice for each, and an absence of duress, undue influence, fraud, or misrepresentation when the agreement was made. English lawyers often advise completing prenuptial agreements at least 28 days before a wedding to mitigate claims of pressure.
For US citizens moving to the UK, it is highly recommended to seek specialist English legal advice on existing foreign prenuptial agreements before or soon after relocation. This allows for an evaluation of the agreement through an English law lens and proactive measures, such as a confirmatory post-nuptial agreement or updates to the existing prenup, to bolster its chances of being upheld. A coordinated approach between English and US lawyers is particularly important for internationally mobile families to ensure compliance with the laws of multiple jurisdictions.
The English court will apply English law if it has jurisdiction over the divorce proceedings, which depends on factors like habitual residence and domicile. Even if a foreign agreement lacked elements typically required under English law, like full financial disclosure or independent legal advice (as in the Radmacher case which involved a German agreement), the court may still attribute weight to it if deemed fair overall. However, ensuring that the agreement aligns as much as possible with English legal principles for prenups significantly increases the likelihood of its terms being respected.
