You live in London, your partner lives in Lyon, and you have decided to get married in France. Since Brexit, the romance is unchanged but the paperwork is not: as a British citizen you are now a third-country national, your birth certificate and single-status documents must travel through legalisation and sworn translation, and the local mairie (the town hall, where civil marriages are celebrated) will examine your file with the same rigour it applies to every foreign national. Most British-French weddings go ahead without difficulty, yet every year a minority are delayed or blocked: a certificate of no impediment missing its apostille, bans (the public notice of the planned marriage) published in the wrong commune, an interview that raises doubts about consent, or a formal opposition entered by the public prosecutor. This guide explains, step by step, how a British citizen gets married in France after Brexit, which papers the officier de l’état civil (the civil registrar, usually the mayor or a deputy) will demand, how the bans and the hearing work, what happens if the prosecutor objects, and how to challenge a refusal before the tribunal judiciaire (the ordinary civil and criminal court). It also covers the choice that many couples overlook until the wedding day: your matrimonial property regime, meaning the default rules that will govern your house, savings and debts. Throughout, every French term is explained, and every decisive legal proposition is anchored in the Civil Code and recent decisions of the Cour de cassation (France’s supreme court for civil matters).
I. Getting married at the French mairie as a British citizen: the file, the bans and the interview
A. Where to marry and which papers to file as a British spouse
French law imposes no nationality condition for marriage: a British citizen can marry in France, whether the other spouse is French, British or of another nationality. What matters is the territorial link. The Civil Code provides: “Le mariage sera célébré, au choix des époux, dans la commune où l’un d’eux, ou l’un de leurs parents, aura son domicile ou sa résidence établie par un mois au moins d’habitation continue à la date de la publication prévue par la loi.” In plain terms, you may marry in the commune where either spouse, or one of your parents, has been domiciled or resident for at least one continuous month by the date the bans are published. In Paris, that means the mairie of the arrondissement of domicile or residence; elsewhere, the single mairie of the commune. If neither you nor your partner has that link with the commune, the registrar must decline to celebrate the marriage there, so establishing and proving the month of residence with utility bills, a rental contract or a tax notice is the first practical step. The legal basis for this rule is article 74 of the Civil Code, and couples who split their lives between the United Kingdom and France should organise their evidence early rather than assume that owning a French second home is enough: ownership is not domicile, and the registrar looks for actual habitation.
Once the commune is settled, each spouse files a dossier (file of supporting documents) with the officier de l’état civil. The starting point is article 70 of the Civil Code: “Chacun des futurs époux remet à l’officier de l’état civil qui doit célébrer le mariage l’extrait avec indication de la filiation de son acte de naissance, qui ne doit pas dater de plus de trois mois s’il a été délivré par un officier de l’état civil français.” For the British spouse, this means a full (long-form) birth certificate showing parentage, not the short version. Because the three-month freshness rule applies on its face to extracts issued by a French registrar, a British certificate does not automatically expire after three months, but in practice many mairies ask for a recently issued copy, and you should order a fresh one from the General Register Office rather than argue the point on the wedding morning. Your birth certificate, like every British civil-status document, must then be made usable in France: since both the United Kingdom and France are parties to the Hague Apostille Convention, the document carries an apostille (a standardised authentication stamp) issued by the Foreign, Commonwealth and Development Office in the United Kingdom, and it must be accompanied by a translation prepared by a traducteur assermenté (a sworn translator registered with a French court of appeal). An uncertified translation, however accurate, will normally be rejected.
The second pillar of the file is proof that you are free to marry. British nationals marrying in France are routinely asked for a certificate of no impediment, often still called by its initials CNI, which is obtained by giving notice at your local register office in England and Wales (or the equivalent procedure in Scotland and Northern Ireland) and which confirms that no legal obstacle to the marriage is recorded. Practice varies between mairies: some accept the CNI alone, others ask in addition for a single-status affidavit sworn before a solicitor or notary, or for a certificat de coutume (a certificate describing the relevant English, Scottish or Northern Irish marriage law, historically issued by the British consulate). Because British consular practice has changed over the years and mairies do not always update their checklists, ask the celebrating mairie in writing exactly which single-status evidence it requires, then work backwards from the wedding date: the CNI procedure in England and Wales takes a minimum of 28 days, the apostille adds days or weeks, and the sworn translation adds more. If you were previously married, add the final divorce decree (decree absolute or final order) or the death certificate of your former spouse, likewise apostilled and translated. If you genuinely cannot obtain your birth record, the Code offers a safety net through the acte de notoriété (a substitute certificate established on witness evidence), and article 71 of the Civil Code allows it to be drawn up abroad by the competent French diplomatic or consular authorities on the faith of at least three witnesses. Foreign documents generally are governed by article 47 of the Civil Code: “Tout acte de l’état civil des Français et des étrangers fait en pays étranger et rédigé dans les formes usitées dans ce pays fait foi, sauf si d’autres actes ou pièces détenus, des données extérieures ou des éléments tirés de l’acte lui-même établissent, le cas échéant après toutes vérifications utiles, que cet acte est irrégulier, falsifié ou que les faits qui y sont déclarés ne correspondent pas à la réalité.” In other words, your British documents are presumed genuine, but the registrar may verify them, and any detectable irregularity will stall the file.
Two further elements complete the dossier. First, each spouse must prove identity with a document issued by a public authority, in practice a valid British passport for the British spouse, plus proof of domicile or residence and the details of the witnesses: their first names, surname, date and place of birth, occupation and address. Second, the file must address the matrimonial property regime. If you sign a contrat de mariage (a notarised marriage contract choosing or tailoring your property regime), the notaire (the French public officer who draws up authentic instruments for family and property matters) gives you a certificate to hand to the registrar before the ceremony. If the marriage record states that no contract was made, you will be deemed married under the default regime as against third parties. The practical lesson is simple: see the notaire before you see the mairie, not after. The official English-language starting point for the whole procedure is the service-public.fr page on marriage in France, and the British side of the single-status procedure is explained on gov.uk marriages and civil partnerships abroad. Finally, capacity itself is governed by each spouse’s personal law: article 202-1 of the Civil Code states that “Les qualités et conditions requises pour pouvoir contracter mariage sont régies, pour chacun des époux, par sa loi personnelle.” For the British spouse, that means English, Scottish or Northern Irish law decides matters such as the minimum age and prior marital status, while French law always insists on one irreducible core, quoted below, which is that both spouses genuinely consent.
B. The bans, the hearing and the wedding ceremony at the mairie
With the file lodged, the registrar publishes the bans. Article 63 of the Civil Code opens with the traditional formula: “Avant la célébration du mariage, l’officier de l’état civil fera une publication par voie d’affiche apposée à la porte de la maison commune.” The notice states the names, occupations, domiciles and residences of both spouses and the place of celebration, and it must remain posted for ten days. Publication is not a mere formality: it is the moment when anyone entitled to object learns of the project, and the wedding cannot lawfully be celebrated until the publication period has run. Only the procureur de la République (the public prosecutor attached to the local court) can dispense with publication or shorten the period, and article 169 of the Civil Code allows that “pour des causes graves”, meaning for serious reasons such as the imminent death of a spouse or an imperative professional departure, never for simple convenience. Couples planning around flights from the United Kingdom should therefore build the ten days, plus the registrar’s examination time, into their schedule, and should confirm the provisional ceremony date in writing rather than booking a venue first.
The same article 63 organises the hearing that most couples experience as a short, friendly conversation and that a minority experience as an interrogation. The Code requires, as the second condition of publication under article 63: “2° A l’audition commune des futurs époux, sauf en cas d’impossibilité ou s’il apparaît, au vu des pièces fournies, que cette audition n’est pas nécessaire au regard des articles 146 et 180 .” The audition commune (the joint interview of both spouses by the registrar) may therefore be skipped only where it is impossible or plainly unnecessary in light of the consent requirements. Where the registrar has reasons to fear that the marriage might later be annulled for lack of genuine consent, the tone changes: “L’officier de l’état civil demande à s’entretenir individuellement avec chacun des futurs époux lorsqu’il a des raisons de craindre, au vu des pièces fournies par ceux-ci, des éléments recueillis au cours de leur audition commune ou des éléments circonstanciés extérieurs reçus, dès lors qu’ils ne sont pas anonymes, que le mariage envisagé soit susceptible d’être annulé au titre des mêmes articles 146 ou 180.” In practice, separate interviews (entretiens individuels) are triggered by warning signs such as spouses who share no common language and cannot explain how they communicate, partners who cannot describe each other’s daily life, a very large age gap combined with a short relationship, a history of prior sponsored marriages, or an anonymous-free tip received by the mairie. British spouses should understand that these questions are not rudeness and not discrimination against foreigners: the registrar is legally obliged to investigate where doubt exists, and a calm, consistent, well-documented account of the relationship is the best preparation. Bring photographs, travel records, correspondence and evidence of shared life only if asked; volunteering a suitcase of proof unprompted can look rehearsed, while answering precisely and consistently looks natural.
When the file is complete, the bans have run and no obstacle has emerged, the ceremony itself follows a fixed script. Article 75 of the Civil Code provides: “Le jour désigné par les parties, après le délai de publication, l’officier de l’état civil, à la mairie, en présence d’au moins deux témoins, ou de quatre au plus, parents ou non des parties, fera lecture aux futurs époux des articles 212 et 213 , du premier alinéa des articles 214 et 215 , et de l’article 371-1 du présent code.” The registrar reads aloud the core duties of spouses (respect, fidelity, help and assistance), receives each spouse’s declaration that they take each other as husband and wife, pronounces them united in marriage, and draws up the acte de mariage (the marriage record). Two to four adult witnesses must attend, and the record notes the matrimonial regime declared. A religious ceremony may follow but can never replace or precede the civil ceremony: in France only the civil marriage creates legal spouses. For British couples, one organisational detail matters: the livret de famille (the official family record book issued at marriage) will be handed over at the ceremony, and certified copies or extracts of the acte de mariage should be requested at once, because the British spouse will need them, with apostille and translation in the other direction, for a passport name change, for HM Passport Office, and later for any residence application.
II. When the mairie or the prosecutor objects: sham-marriage suspicion, opposition and how to challenge a refusal
A. How British couples face opposition to marriage and get it lifted by the court
Consent is the foundation of every French marriage. Article 146 of the Civil Code states, in six words that dominate this entire field: “Il n’y a pas de mariage, lorsqu’il n’y a point de consentement.” A sham marriage (mariage blanc), contracted for residence or nationality advantages without any intention of shared life, and a forced marriage (mariage forcé), imposed on an unwilling spouse, both fail this test. Article 180 of the Civil Code adds: “Le mariage qui a été contracté sans le consentement libre des deux époux, ou de l’un d’eux, ne peut être attaqué que par les époux, ou par celui des deux dont le consentement n’a pas été libre, ou par le ministère public.” The ministère public (the prosecution service acting as guardian of the public interest) may therefore attack an insincere marriage even after celebration, and before celebration it may block it through opposition (a formal legal objection entered against the planned wedding). Opposition is not limited to the prosecutor: article 172 of the Civil Code gives the right to a person already married to one of the spouses, and article 173 gives it to fathers, mothers and, failing them, grandparents, even where the child is an adult. Whatever its author, every opposition must satisfy strict formalities, because article 176 of the Civil Code opens: “Tout acte d’opposition énonce la qualité qui donne à l’opposant le droit de la former.” It must state the opponent’s standing, the grounds, the legal text relied upon and an address for service in the place of celebration, failing which it is void.
For British couples, the most common route to opposition runs through the prosecutor. Where the registrar’s file or interviews reveal serious indications (indices sérieux) that the marriage might be annulled, the registrar alerts the prosecutor, who investigates and may enter a reasoned, time-limited opposition that freezes the wedding. The leading recent illustration comes from the Cour de cassation itself. On 25 March 2026, in decision no. 24-12.863, published in the Bulletin, the First Civil Chamber approved a prosecutor who, alerted by consular authorities about a marriage suspected of lacking genuine consent, had gathered further information before deciding, including a hearing of the France-based spouse entrusted to investigators under his authority. The Court recalled the governing text: “Lorsque des indices sérieux laissent présumer que le mariage envisagé encourt la nullité au titre des articles 144, 146, 146-1, 147, 161, 162, 163, 180 ou 191, l’autorité diplomatique ou consulaire saisit sans délai le procureur de la République compétent et en informe les intéressés.” It then held: “Le ministère public agissant en la matière pour la défense de l’ordre public, c’est à bon droit que la cour d’appel a, tant par motifs propres qu’adoptés, retenu qu’en application de l’article 171-4 du code civil, il appartenait à celui-ci, dans un contexte où l’autorité consulaire de [Localité 1] avait mis en lumière l’existence d’indices laissant présumer que le mariage envisagé était susceptible d’encourir la nullité sur le fondement de l’article 146 du code civil, de recueillir toute information complémentaire avant de prendre sa décision, et qu’en conséquence, la validité de l’audition de Mme [T], seule domiciliée en France, confiée à des enquêteurs relevant de l’autorité du procureur de la République, ne pouvait être remise en cause.” The lesson for British spouses is direct: once serious doubt is on file, the prosecutor is entitled to dig, including through police investigators, and challenges to the investigation itself will fail. The only effective response is substantive, showing genuine consent through the history, reality and projects of the relationship.
An opposition is not the end of the road; it is the start of a fast court procedure called mainlevée (the lifting of the objection by a judge). Either spouse, even a minor, may apply to the tribunal judiciaire at any time, and article 177 of the Civil Code promises speed: “Le tribunal judiciaire prononcera dans les dix jours sur la demande en mainlevée formée par les futurs époux, même mineurs.” If the case goes to appeal, article 178 continues: “S’il y a appel, il y sera statué dans les dix jours et, si le jugement dont est appel a donné mainlevée de l’opposition, la cour devra statuer même d’office.” In practice, then, the timetable is measured in weeks, not months, but the hearing is searching: the court re-examines the entire file, hears the spouses, and decides whether the doubt is dispelled. Couples should arrive with coherent, dated evidence of shared life and common plans, consistent accounts from both spouses, and, where language is an issue, a professional interpreter rather than a family member. A lawyer experienced in family and foreigners’ procedure adds real value here, because the same facts will later matter for the British spouse’s residence application, and contradictions stated carelessly before the lifting judge can resurface years later. If the court lifts the opposition, the mairie must proceed; if it confirms it, the marriage cannot be celebrated while the objection stands, and the spouses must either appeal within the short time limit or rebuild the file and try again once the underlying doubts can genuinely be answered.
B. After the wedding: your property regime, your name and the British spouse’s residence
Many British couples choose the wedding date first and discover the property regime later, yet the regime decides who owns what from the day of the ceremony. French law starts from freedom: article 1387 of the Civil Code declares that “La loi ne régit l’association conjugale, quant aux biens, qu’à défaut de conventions spéciales que les époux peuvent faire comme ils le jugent à propos, pourvu qu’elles ne soient pas contraires aux bonnes moeurs ni aux dispositions qui suivent.” Spouses may therefore design their own rules in a contrat de mariage signed before a notaire, choosing separation of property (each keeps what is theirs), participation in acquisitions, or a tailored community, and British families with unequal premarital assets, children from a first marriage or a French second home often gain real protection from doing so. The contract must be drawn up before the wedding, because article 1394 of the Civil Code requires that “Toutes les conventions matrimoniales seront rédigées par acte devant notaire, en la présence et avec le consentement simultanés de toutes les personnes qui y sont parties ou de leurs mandataires.” The notaire then issues the certificate that is handed to the registrar, and the chosen regime is mentioned in the marriage record. Without a contract, the default applies automatically: article 1400 of the Civil Code states that “La communauté, qui s’établit à défaut de contrat ou par la simple déclaration qu’on se marie sous le régime de la communauté, est soumise aux règles expliquées dans les trois sections qui suivent.” That default is the communauté réduite aux acquêts (community limited to property acquired during the marriage): what each spouse owned before the wedding or receives during it by gift or inheritance stays personal, while earnings, savings and property bought during the marriage become common, and debts follow a matching logic. For a British couple buying a French house after the wedding with one spouse’s premarital savings, the tracing of those funds in the notaire’s deed matters enormously; money that cannot be shown to be personal falls into the community and will be divided on divorce or death.
Two further cross-border points deserve attention before they become disputes. First, capacity and consent remain governed by each spouse’s personal law, and the courts apply that rule even-handedly. In decision no. 21-11.106 of 18 May 2022, the First Civil Chamber restated that “Aux termes de l’article 202-1 du code civil, les qualités et conditions requises pour pouvoir contracter mariage sont régies, pour chacun des époux, par sa loi personnelle. Quelle que soit la loi personnelle applicable, le mariage requiert le consentement des époux, au sens de l’article 146 et du premier alinéa de l’article 180.” It added, citing article 146, that “Il n’y a pas de mariage lorsqu’il n’y a point de consentement.”, and concluded on the facts that “Il en résulte que l’action était en réalité fondée sur l’article 146 du code civil, de sorte que la loi française était applicable.” Whatever law governs the British spouse’s capacity, in other words, French courts will always test the reality of consent under article 146, and a marriage celebrated abroad to evade that control gains nothing. The same vigilance appears in decision no. 19-11.573 of 18 March 2020, where the Court combined the Franco-Moroccan convention’s rule that substantive conditions of marriage are governed by each spouse’s national law with the French requirement of genuine consent, confirming that foreign formalities incompatible with French public policy cannot manufacture a valid marriage. British couples married by proxy or in procedures unfamiliar to French law should therefore regularise their thinking: a marriage validly celebrated in France under articles 63 to 76 leaves no such weakness.
Second, marriage does not by itself confer residence. Since the end of free movement, a British citizen who marries in France but lives in the United Kingdom still needs the appropriate long-stay visa to settle, and a British spouse already in France must hold or obtain a suitable titre de séjour (residence permit) in the applicable category; the wedding certificate is powerful supporting evidence but not a permit. Newlywed British spouses should therefore calendar three tasks for the weeks after the ceremony: obtain recent copies of the acte de mariage for every administration that will ask (prefecture, social security, bank, HM Passport Office, pension providers); align surnames and marital status across French and British documents, remembering that French law keeps each spouse’s birth name as the legal name while usage of the spouse’s name is permitted socially; and file the residence or visa application with the marriage certificate, proof of shared address, and evidence of resources and health cover. Where the couple plans to live partly in each country, tax residence, succession planning for the French house and the interaction of the matrimonial regime with English wills should be reviewed together, because the community regime chosen by silence at the mairie will shape what each spouse actually owns when the first estate has to be settled.
Conclusion
Getting married in France as a British citizen after Brexit is an entirely realistic project, provided the couple treats the mairie as a legal process rather than a booking. Choose the commune where the one-month residence link genuinely exists; build the file around a full birth certificate with apostille and sworn translation, a properly obtained certificate of no impediment, and honest answers about the relationship; respect the ten-day publication of the bans and prepare for the joint interview as the normal heart of the procedure, not as an insult. Above all, understand that genuine consent is the one requirement no document can replace: where it exists, an opposition can be lifted by the tribunal judiciaire within days, and the marriage goes ahead; where it is missing, the prosecutor, the courts and ultimately article 146 will stop the ceremony, and rightly so. Take the notaire’s advice on the property regime before the wedding rather than litigating it in a divorce years later, and calendar the British spouse’s residence steps for the day after the ceremony. Done in that order, a Franco-British wedding gives the couple not only a celebration but a clean legal foundation for everything that follows: the home, the finances and the right to live together in France.
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