You are British, you live between London and Lyon, or you have settled in Paris, and you want to marry in France: at the mairie (the town hall, the only place where a legally valid wedding can take place in France), the registrar hands you a list of documents that looks nothing like the English paperwork. Your partner is French, or British like you, and the officer asks for a birth certificate issued within the last three or six months, a proof of single status with a name you do not recognise, a translation by a sworn translator, and proof of one month of residence in the commune. Since Brexit, a second question hangs over the file: once the wedding is celebrated, will the British spouse actually be allowed to stay in France, and will England recognise a marriage celebrated by a French mayor? This guide answers both questions in order. The first part explains the file you must lodge at the mairie, the single-status proof that replaces the old certificate of no impediment for British citizens, and the rules on where the ceremony can take place, who must attend, and what the registrar reads aloud. The second part deals with refusals and oppositions by the procureur de la République (the public prosecutor, the magistrate who defends public order in civil matters), sham-marriage investigations, and the remedies before the tribunal judiciaire (the ordinary civil court), then sets out what the wedding changes: surname, property between spouses, the residence card of the British spouse, and recognition of the French marriage in England. Every decisive statement below is anchored to the exact text of the statute or to quoted passages of reported decisions.

I. What file must a British citizen lodge at the French mairie, and where can the wedding take place?

The French civil wedding is a creature of paperwork and place. Unlike in England and Wales, where an authorised venue or a church can host the legal ceremony, in France only the officier de l’état civil (the civil registrar, usually the mayor or a deputy) can marry you, and only in a commune with which at least one of you has a genuine link. Get the file or the commune wrong and the date you booked collapses. Get them right and the rest of the process runs on rails.

A. How does a British citizen prove single status after Brexit, and which papers complete the file?

The most persistent misunderstanding concerns the certificate of no impediment. For decades, British citizens marrying abroad applied to their local register office in England and Wales for a certificate of no impediment, a document stating that no legal obstacle to the marriage was known. Since Brexit, and as the British government now states on its official guidance page for marriage in France, a British national getting married in France does not need a certificate of no impediment from the United Kingdom government, and instead provides a self-declaration of single status, sometimes still called a certificat de célibat (certificate of unmarried status) or affirmation, sworn before a solicitor or notary and, where the mairie requires it, legalised. Do not let a wedding planner or an out-of-date blog send you to a register office for a 28-day notice procedure that the French registrar will not recognise: check the current British government guidance on the self-declaration form for marriage in France and ask your mairie in writing which form of declaration it accepts. Where the declaration is drawn up in English, the mairie will ask for a translation by a traducteur assermenté (a translator sworn in before a French court of appeal, the only translator whose work the administration must accept) and, for some documents, an apostille under the Hague Convention, the stamp that authenticates a foreign public document.

The backbone of the file is set by article 63 of the Civil Code, which makes the celebration conditional on handing over, for each future spouse, the documents required by articles 70 and 71, proof of identity issued by a public authority, the details of the witnesses, and, where relevant, proof that the adult under a protection measure has been informed. The birth certificate rule catches many British couples out. Article 70 of the Civil Code requires each future spouse to give the registrar an extract of the birth record showing parentage, and where that extract was issued by a French registrar it must be less than three months old; a British birth certificate, issued by a foreign authority, is generally expected to be recent, typically less than six months, and accompanied by its sworn translation, with some mairies asking for legalisation on top. Order a new full birth certificate showing your parents, not a short version, and have it translated early: this single document causes more postponed weddings than any other. Add valid passports or national identity documents, proof of address in the commune, the list of witnesses with their identity details, and, where either of you was previously married, the death certificate of the former spouse or the final divorce decree with proof that it is final and recognised. If either future spouse is widowed or divorced, article 76 of the Civil Code requires the marriage record to state the forenames and surname of the previous spouse, so the registrar will insist on seeing that earlier paperwork.

Two substantive conditions run underneath the paperwork and explain why the file is examined so closely. First, age: article 144 of the Civil Code provides that “Le mariage ne peut être contracté avant dix-huit ans révolus.” There is no parental opt-out at seventeen as a matter of course; marriage under eighteen requires the narrow dispensation procedure, which the prosecutor examines strictly. Second, consent: article 146 of the Civil Code provides that “Il n’y a pas de mariage, lorsqu’il n’y a point de consentement.” That short sentence carries the whole law of sham marriages, forced marriages, and mistaken-identity cases. Where the registrar has reasons to fear that the planned marriage may be void for lack of genuine consent, article 63 allows the registrar to ask to interview each future spouse separately, and that interview, the audition, becomes the fork in the road: a convincing file moves to publication of the banns, while a doubtful one travels to the prosecutor. If you organise your file with this logic in mind, proof of a real shared life, correspondence, travel, knowledge of each other’s families, common language or credible plans, you answer the only question the registrar and the prosecutor are asking. For couples who also need to understand what the wedding will do to their house and savings, our companion guide on which matrimonial regime owns the house of a couple married in England and living in France completes this picture, and couples who hesitate between marriage and a lighter union can compare with our guide on indivision, tontine and PACS for unmarried buyers.

B. In which commune can you marry, and how do the banns, the witnesses and the ceremony work?

Place comes first because it decides which mairie even has the power to marry you. Article 74 of 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 practice, you marry where one of you lives, or where one of your parents lives, provided the month of continuous residence is documented by utility bills, tax notices, or a formal attestation. A château wedding in the Dordogne with no link to the commune cannot be the civil wedding; it can only be a blessing after a civil ceremony in the competent mairie. Couples living in London with parents in France use the parents’ commune; couples living in France use their own. Paris deserves a practical warning: each arrondissement mairie applies the residence test with its own strictness, and waiting lists for Saturday slots run several months ahead, so file as soon as the month of residence is evidenced rather than waiting for every foreign document to arrive.

Once the file is lodged, the registrar publishes the banns, the publication des bans, the public notice of the planned marriage displayed at the town hall door. Article 63 describes that display: it states the forenames, surnames, occupations, domiciles and residences of the future spouses and the place of celebration. The notice must remain posted for ten days, and the wedding cannot be celebrated until that period expires, unless the procureur de la République grants a dispensation for serious reasons. Article 169 of the Civil Code gives that power to the prosecutor of the district where the wedding is to take place, who may dispense with publication and any waiting period, or with the display alone, for grave cause such as imminent childbirth, serious illness, or an unavoidable professional departure. Treat dispensation as the exception: file early enough that you never need it.

The ceremony itself follows a script the law writes word for word. Article 75 of the Civil Code requires the registrar, at the town hall, in the presence of at least two and at most four witnesses, to read to the future spouses the texts on mutual respect, fidelity, help and assistance, the contribution to the expenses of the marriage, and parental authority. The registrar then receives each spouse’s declaration that they wish to take each other as husband and wife, or as spouses, and pronounces the union. Witnesses must be adults; they need not be French or resident in France, but they must prove their identity, which is why their details are collected at the filing stage. The religious or outdoor celebration that many British couples picture, the candlelit barn or the village church, has no legal effect in France unless this civil ceremony came first; a priest who celebrates a religious wedding before the civil one commits an offence. After the ceremony, the registrar draws up the acte de mariage (the marriage record), whose mandatory contents article 76 lists in detail, and issues the livret de famille (the family record book). Ask for several certified copies of the acte de mariage before leaving the building: the Home Office, the French prefecture, banks, and pension funds will each want an original, and returning for copies months later from London wastes weeks.

II. What happens when the mairie or the prosecutor objects, and what does the wedding change for residence?

A refused file or a formal opposition feels like a full stop, but the statute treats it as a comma: the prosecutor investigates where serious indications exist, the spouses are heard, and a judge decides. The same part of this guide then follows the wedding into its consequences, because for a British citizen after Brexit the most valuable effect of the marriage is often the residence right it opens, and the most overlooked step is making sure England recognises what the French mayor did.

A. How do you answer a sham-marriage suspicion, lift an opposition, and meet the deadlines that actually bind the judge?

Two different blocks can stop the wedding, and the remedy depends on which one you face. The softer block is the registrar’s doubt: separate interviews, requests for further proof, referral of the file to the prosecutor. The harder block is the prosecutor’s opposition à mariage (formal objection to the celebration), served on the mairie and on both spouses, which forbids the registrar from celebrating until the objection is lifted. Opposition is not a moral judgment on a mixed couple; it is the instrument by which the ministère public (the prosecution service) defends public order against marriages that would be void, above all for absence of genuine consent. The leading recent authority states the principle plainly: “Le ministère public agissant en la matière pour la défense de l’ordre public” (the prosecution service acts in this field in defence of public order), from the Court of Cassation, First Civil Chamber, 25 March 2026, appeal no. 24-12.863. That decision concerned a French-Moroccan couple whose request for a certificate of capacity to marry through the French consulate drew an opposition from the Nantes prosecutor in October 2019; the spouses sought lifting of the objection, and the Court of Cassation upheld the appeal court’s approach to the investigation. The statutory engine is article 171-4 of the Civil Code, which the Court quotes in full: “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.” The prosecutor then has two months from referral to serve a reasoned decision of opposition, and the spouses may apply at any time to the tribunal judiciaire for lifting under articles 177 and 178. Critically for British couples marrying at a French mairie rather than abroad, the mirror provision for domestic celebrations produces the same structure: serious indications, a reasoned opposition, and review by a judge who examines consent for what it is.

Consent is where these cases are won and lost, and the test is the one stated by article 146 of the Civil Code: “Il n’y a pas de mariage, lorsqu’il n’y a point de consentement.” The Court of Cassation recalls this very formula before examining consent-based oppositions (see the Court of Cassation, First Civil Chamber, 25 March 2026, appeal no. 24-12.863). In that case the Court approved the appeal judges for holding that, once the consular authority had brought to light indications suggesting the planned marriage might be void on the basis of article 146, the prosecution service was entitled to gather further information before deciding, and the validity of the interview of the spouse domiciled in France, entrusted to investigators under the prosecutor’s authority, could not be called into question. Translate that into practical advice: the interview is lawful, investigators may be used, and inconsistent answers about how you met, when you last saw each other, who pays for what, or whether you share a language will be quoted back at you. Prepare as a couple, not as two individuals: agree the story because it is true, bring dated evidence of the relationship, and never invent cohabitation that utility bills contradict. Where the wedding has already taken place abroad and the fight is about transcription onto French records rather than celebration in France, the companion authority is the Court of Cassation, First Civil Chamber, 5 April 2023, appeal no. 21-15.196, which answers the deadline argument that desperate spouses always raise. The spouses argued that because the courts had not ruled within the one-month periods of article 171-7, the stay on transcription had ended and transcription was automatic. The Court’s answer was blunt: “Le non-respect de ces délais n’est assorti d’aucune sanction et ne saurait entraîner de plein droit la mainlevée de l’opposition.” Late does not mean lifted. Do not build a strategy on the court’s diary; build it on evidence of genuine consent. A third decision in the same series, the Court of Cassation, First Civil Chamber, 25 March 2026, appeal no. 24-16.383, confirms that this control extends to marriages celebrated abroad by foreign authorities where transcription is sought, so a couple who marry in Gretna Green or Gibraltar to sidestep French scrutiny gains nothing if they later need French records to show.

The two statutes that organise these fights deserve direct quotation because they allocate the burden. Article 202-1 of the Civil Code subjects the qualities and conditions for marrying, for each spouse, to that spouse’s personal law, while insisting that whatever that personal law says, marriage requires consent within the meaning of article 146. For a British spouse, English law therefore governs capacity in principle, but French public order on consent always applies on French soil. Article 202-2 of the Civil Code adds that a marriage is validly celebrated if done according to the formalities of the state where it took place, which is why a French civil ceremony cures most form defects and why a purely religious or humanist ceremony in France cures none. If opposition lands, act fast and in the right order: instruct a lawyer immediately, file the application for lifting (demande en mainlevée) before the tribunal judiciaire of the place of celebration, attach every proof of genuine married life, and ask for expedition where a visa, a pregnancy, or a posting deadline makes delay harmful. Keep the marriage file and the residence file on separate tracks in your head: winning the lifting order authorises the mairie to celebrate, but it does not by itself grant any residence card; losing on consent, by contrast, poisons the later residence application, because the prefecture will read the judgment.

B. After the wedding, what changes for your name, your property, your right to stay in France, and recognition in England?

The day after the ceremony, four practical files open at once, and British couples who handle them in the wrong order pay for the mistake for years. Start with the surname, because it surprises English spouses most. French law does not change your surname on marriage: each spouse keeps their birth name as the only legal name, with a mere right to use the other spouse’s name in daily life, the nom d’usage. A British wife who becomes Mrs Smith in daily dealings in London remains Miss Jones in every French register unless she completes the English deed poll route and then asks for her French documents to reflect the position where permitted. Tell banks and employers which name you use and keep the acte de mariage with you whenever the two names diverge, or payments and travel bookings will mismatch at the worst moment.

Property between spouses is the second file, and the default catches cross-Channel couples unprepared. Without a marriage contract signed before a French notaire (the public officer who alone can authenticate matrimonial contracts and conveyances), a couple married in France falls under the statutory community regime, and a British couple who married in England before moving to France brings with it the English regime of separation as determined by the conflict rules, with the Hague Convention of 1978 designating the applicable law through nationality, residence and choice. Do not assume that an English separation of property travels silently into a French purchase: lenders, notaires, and the land registry read the regime to decide who owns what and who must sign the mortgage. Where substantial assets, children from an earlier union, or a family company are involved, a French marriage contract or a declared choice of law before the wedding costs a fraction of the litigation it prevents. Read our detailed analysis of matrimonial regimes for couples married in England and living in France before signing anything, and take advice before the ceremony, not after, because changing regime once married requires a new notarial deed and, where children are involved, judicial approval.

Residence is the third file, and since 1 January 2021 it is the one where marriage changes everything for a British citizen. Before Brexit, an EU passport made the question invisible; now a British spouse is a third-country national who needs a title to stay beyond a short visit. Where the other spouse is French, article L.423-1 of the Code on the Entry and Stay of Foreigners and Asylum provides: “L’étranger marié avec un ressortissant français, se voit délivrer une carte de séjour temporaire portant la mention ” vie privée et familiale ” d’une durée d’un an lorsque les conditions suivantes sont réunies : 1° La communauté de vie n’a pas cessé depuis le mariage ; 2° Le conjoint a conservé la nationalité française ; 3° Lorsque le mariage a été célébré à l’étranger, il a été transcrit préalablement sur les registres de l’état civil français.” Three conditions, three traps. Continued community of life means the prefecture may investigate, visit, and interview neighbours; a separation in fact, even without divorce, can sink renewal. Conserved French nationality is checked, not assumed. And transcription means a couple married in England must first get the English marriage onto French records through the consulate before the prefecture moves. Where both spouses are British and one already holds a French residence card, the route is family reunification rather than the spouse-of-French route, with its own housing, income and waiting-period conditions, and where the British spouse entered on a short-stay visa, article L.412-1 of the same Code makes first issue of a temporary or multi-year card conditional in principle on holding the long-stay visa mentioned in article L.411-1, subject to international commitments and stated exceptions. In plain terms: do not enter as a tourist for the wedding and assume the prefecture will regularise you at the counter the next morning. Plan the visa before the banns, keep every boarding pass and utility bill that proves uninterrupted life together, and challenge a refusal within the time limit by administrative appeal then before the administrative court, because the residence file moves on deadlines measured in weeks, not seasons.

Recognition in England is the fourth file, and here the news is reassuring if the paperwork is complete. A marriage validly celebrated by a French officier de l’état civil in compliance with French formalities is recognised in England as a valid foreign marriage, provided each party had capacity under their own law and both consented; article 202-2 expresses the French side of that same conflicts logic. After the ceremony, obtain the multilingual or apostilled copy of the acte de mariage where the receiving authority requires it: the competent court of appeal legalises French civil-status documents for use abroad, and a sworn translation accompanies the record where English authorities ask for one. Notify the Home Office immigration files, your passport records where you seek a new passport in a married name, pension providers on both sides of the Channel, and the French health and tax administrations, because a marriage recognised nowhere in practice is a marriage you must keep proving. Couples who married abroad and now live in France should reverse the sequence: secure transcription onto French registers first, then the residence card, then the English-side notifications, since each step feeds the next.

Conclusion

Marrying in France as a British citizen after Brexit is a two-act procedure wearing the clothes of one celebration. Act one belongs to the mairie: prove single status through the self-declaration route the British authorities now prescribe rather than a certificate of no impediment no one will issue, lodge a recent full birth certificate with its sworn translation, evidence the month of residence that founds the commune’s power under article 74, survive the ten days of banns, and stand before the registrar with two to four witnesses while articles on loyalty, help and parental authority are read aloud. Act two belongs to the consequences: keep your birth name in French law while organising the nom d’usage, fix the matrimonial property regime before it fixes you, convert the marriage into a carte de séjour vie privée et familiale where the spouse is French without assuming a tourist entry will suffice, and carry the apostilled acte de mariage back across the Channel so England sees what France celebrated. Where suspicion of a sham marriage surfaces, remember the two sentences that decide these cases: consent is everything, and delay never lifts opposition by itself. Gather proof of genuine married life early, seek lifting before the tribunal judiciaire without waiting for the calendar to rescue you, and keep the wedding file and the residence file moving in parallel. Done in that order, the French civil wedding remains what it has always been for mixed couples: demanding on paper, solemn in the council chamber, and, once properly recorded on both sides of the Channel, the strongest foundation a British-French household can give itself.