{"id":2138574,"date":"2026-10-04T19:02:27","date_gmt":"2026-10-04T17:02:27","guid":{"rendered":"https:\/\/kohenavocats.fr\/2026\/10\/04\/british-naturalisation-refused-adjourned-challenge-minister-nantes-court-brexit\/"},"modified":"2026-10-04T19:02:27","modified_gmt":"2026-10-04T17:02:27","slug":"british-naturalisation-refused-adjourned-challenge-minister-nantes-court-brexit","status":"publish","type":"post","link":"https:\/\/kohenavocats.fr\/en\/2026\/10\/04\/british-naturalisation-refused-adjourned-challenge-minister-nantes-court-brexit\/","title":{"rendered":"British Naturalisation Refused or Adjourned After Brexit: How to Challenge the Decision Before the Minister and the Nantes Court"},"content":{"rendered":"

You are British, you have lived in France since before or after Brexit, and you have decided to apply for French nationality. Then the letter arrives: your application for naturalisation by decree (naturalisation par d\u00e9cret<\/em>) has been declared inadmissible (irrecevable<\/em>), rejected (rejet<\/em>) or adjourned for two years (ajournement<\/em>). For a British citizen, the shock is often greater than for other nationalities. Before Brexit you did not need French nationality at all; since 1 January 2021 you live here as a third-country national, your residence depends on a card, and naturalisation looked like the door back to permanence. A refusal feels like that door closing. It is not. French law gives you two structured ways to fight back: first a compulsory administrative appeal to the minister of the interior (recours administratif pr\u00e9alable obligatoire<\/em>), then a court challenge before one single court for the whole of France, the administrative court of Nantes (tribunal administratif de Nantes<\/em>), whatever your address, whether you live in Paris, Lyon or a Dordogne village. This guide explains, with the exact statutory texts and three court decisions from 2025 and 2026 quoted word for word, why British files are refused, how the two-month deadlines work, and when judges actually overturn the minister. It completes our guide to becoming French by naturalisation or marriage after Brexit<\/a>, which describes the two routes in full; here the focus is entirely on the refusal and how to challenge it.<\/p>\n

I. Why was my French naturalisation refused or adjourned after Brexit?<\/h2>\n

A. Do I meet the five-year residence and good-conduct conditions, or was my file inadmissible?<\/h3>\n

The first question the administration asks about your file has nothing to do with how British you feel or how long you have loved France. It is purely legal: do you satisfy the statutory conditions, and if not, your request is inadmissible, which means it is not even examined on its merits. The central condition is habitual residence. Article 21-17 of the Civil Code<\/a> states: “Sous r\u00e9serve des exceptions pr\u00e9vues aux articles 21-18 , 21-19 et 21-20 , la naturalisation ne peut \u00eatre accord\u00e9e qu’\u00e0 l’\u00e9tranger justifiant d’une r\u00e9sidence habituelle en France pendant les cinq ann\u00e9es qui pr\u00e9c\u00e8dent le d\u00e9p\u00f4t de la demande.” Five years of habitual residence in France immediately before the application: that is the rule for a British applicant as for any other third-country national since Brexit. Years spent in France while the United Kingdom was still in the European Union count, provided the residence was continuous and habitual, so a Briton who settled in 2018 and applies in 2026 normally satisfies the duration condition. What breaks it is discontinuity: long returns to the United Kingdom, a centre of family life kept across the Channel, or tax residence remaining British can all lead the prefecture (pr\u00e9fecture<\/em>, the local office of the State that investigates your file) to doubt that your habitual residence is really in France.<\/p>\n

Two statutory reductions of that five-year period matter particularly for British residents. Article 21-18 of the Civil Code<\/a> provides: “Le stage mentionn\u00e9 \u00e0 l’article 21-17 est r\u00e9duit \u00e0 deux ans : 1\u00b0 Pour l’\u00e9tranger qui a accompli avec succ\u00e8s deux ann\u00e9es d’\u00e9tudes sup\u00e9rieures en vue d’acqu\u00e9rir un dipl\u00f4me d\u00e9livr\u00e9 par une universit\u00e9 ou un \u00e9tablissement d’enseignement sup\u00e9rieur fran\u00e7ais”. A British student who completed two years of higher education in a French university and stayed on, which is a common trajectory in Paris, benefits from this two-year reduction. The same article reduces the period for a foreigner who has rendered or can render important services to France through ability and talent, and for one with an exceptional integration record in civic, scientific, economic, cultural or sporting life. Check these exceptions before assuming you must wait five years; many British professionals, researchers and artists qualify without realising it.<\/p>\n

Residence alone is never enough, because naturalisation also requires the stability of your personal and economic life in France. The official English-language page of service-public.fr plainly warns British applicants that keeping a spouse or children abroad while residing in France can lead to a refusal of French nationality. This hits a recognisably British pattern: one spouse working in France while the partner and children remain in London, the children schooled in England, the family home still in Surrey. The administration reads that pattern as a centre of interests outside France and may reject the application as inopportune even where the five years are complete. The same logic applies to resources: unstable, insufficient or undeclared income, prolonged unemployment without prospects, or tax debts recorded against you suggest an integration that is not yet complete. None of this is about punishment; it is about the legal nature of the decision, which the courts repeat in almost every judgment. When the minister rejects although the legal conditions appear met, he is exercising a discretion, and the administration expects the file to prove durable roots: continuous residence, work or genuine means, taxes paid in France, and family life centred here.<\/p>\n

Conduct is the third pillar, and British applicants sometimes underestimate how wide the enquiry goes. Once your file reaches the minister, the decree organising the procedure provides for any further enquiry the minister considers useful into the applicant’s conduct and loyalty. Your criminal record (casier judiciaire<\/em>, bulletin no. 2, which the minister consults), your driving penalty history in serious cases, unpaid fines that became court convictions, and any intelligence about disloyal behaviour are all weighed. A recent prison sentence or a string of convictions for dishonesty will normally sink the application. But, and this is the point developed in Part II, old and minor matters do not automatically justify a refusal, and judges have annulled decisions built on them. Keep every document proving rehabilitation: proof the fine was paid, years without any new offence, steady work and family life since. What the file does not prove, the administration will not assume in your favour.<\/p>\n

Finally, understand the exact vocabulary of the decision you received, because your remedies depend on it. The administration can declare your request inadmissible (irrecevable<\/em>) where a legal condition is missing, for example only three years of residence with no applicable reduction; it can reject it (rejet<\/em>) where naturalisation appears inopportune even though the conditions are met; or it can adjourn it (ajournement<\/em>), imposing a waiting period, typically two years, so you can improve something, often professional integration or language. The decree states the minister’s alternatives in these terms: “Lorsque les conditions requises par la loi sont remplies, le ministre charg\u00e9 des naturalisations propose, s’il y a lieu, la naturalisation ou la r\u00e9int\u00e9gration dans la nationalit\u00e9 fran\u00e7aise. Lorsque ces conditions ne sont pas remplies, il d\u00e9clare la demande irrecevable.” And where the conditions are met but the grant seems premature: “Si le ministre charg\u00e9 des naturalisations estime qu’il n’y a pas lieu d’accorder la naturalisation ou la r\u00e9int\u00e9gration sollicit\u00e9e, il prononce le rejet de la demande. Il peut \u00e9galement en prononcer l’ajournement en imposant un d\u00e9lai ou des conditions.” Read your notification letter carefully to identify which of the three you face, because the re-application rules differ: after a rejection, a fresh application filed less than five years after notification may be closed without examination unless you show genuinely new circumstances; after an adjournment, you simply wait out the period and reapply, and the same decree adds: “Ce d\u00e9lai une fois expir\u00e9 ou ces conditions r\u00e9alis\u00e9es, il appartient \u00e0 l’int\u00e9ress\u00e9, s’il le juge opportun, de d\u00e9poser une nouvelle demande.” All three quotations come from article 48 of decree no. 93-1362 of 30 December 1993<\/a>, the procedural heart of every naturalisation file.<\/p>\n

B. Will I pass the French language and assimilation interview at the prefecture?<\/h3>\n

For British applicants, the single most common ground of refusal is not residence and not conduct. It is assimilation (assimilation \u00e0 la communaut\u00e9 fran\u00e7aise<\/em>), tested through the French language and through an interview at the prefecture about the history, culture and institutions of the Republic. The statutory bar is high and it was raised again recently, so read it exactly. Article 21-24 of the Civil Code<\/a> provides: “Nul ne peut \u00eatre naturalis\u00e9 s’il ne justifie de son assimilation \u00e0 la communaut\u00e9 fran\u00e7aise, notamment par une connaissance suffisante, selon sa condition, de la langue, de l’histoire, de la culture et de la soci\u00e9t\u00e9 fran\u00e7aises, dont le niveau et les modalit\u00e9s d’\u00e9valuation sont fix\u00e9s par d\u00e9cret en Conseil d’Etat, et des droits et devoirs conf\u00e9r\u00e9s par la nationalit\u00e9 fran\u00e7aise ainsi que par l’adh\u00e9sion aux principes et aux valeurs essentiels de la R\u00e9publique.” Nobody may be naturalised without proving assimilation to the French community. The same article then fixes the language standard in terms every Briton holding an English degree should note: “L’int\u00e9ress\u00e9 justifie d’un niveau de langue lui permettant au moins de comprendre le contenu essentiel de sujets concrets ou abstraits dans un texte complexe, de communiquer avec spontan\u00e9it\u00e9, de s’exprimer de fa\u00e7on claire et d\u00e9taill\u00e9e sur une grande vari\u00e9t\u00e9 de sujets.” Understanding complex texts, conversing spontaneously, expressing yourself clearly and in detail on a wide range of subjects: that is level B2 of the Common European Framework, in speaking and in writing. Everyday conversational French picked up over years in the Dordogne, fluent enough for the market and the neighbours, is frequently not enough.<\/p>\n

The official English-language guidance confirms the level and the proofs. Service-public states that applicants must show spoken and written French at least equal to CEFR level B2. The accepted proofs are listed on the official language-proof page<\/a>: a French diploma, a professional certification at the required level, a diploma attesting B2 French, or a certificate of success in the TCF test issued within the last two years by France \u00c9ducation International or the TEF issued within the last two years by the Paris Chamber of Commerce and Industry. Two practical warnings follow. First, the certificate must be less than two years old when you file; the TCF you passed three years ago is worthless for the file. Second, narrow exemptions exist, including for applicants from a French-speaking country educated five years or more in a French-language institution, and adjustments exist for disability or health conditions, but a British applicant schooled in English in the United Kingdom cannot claim any of them and must simply produce the diploma or sit the test. Prepare the test seriously: the written component fails many Anglophone candidates whose spoken French is good.<\/p>\n

Beyond the certificate, you will be summoned to an assimilation interview (entretien d’assimilation<\/em>) at the prefecture of your department of residence, Paris included. The interview checks adherence to the fundamental principles and values of the Republic, and at its end article 21-24<\/a> requires that “A l’issue du contr\u00f4le de son assimilation, l’int\u00e9ress\u00e9 signe la charte des droits et devoirs du citoyen fran\u00e7ais.” You sign the charter of the rights and duties of the French citizen. The interview report (compte-rendu d’entretien<\/em>) then becomes the decisive document of your file, and two recent appeal decisions show how judges use it. In a judgment of 13 January 2026, the Nantes appeal court upheld the rejection of a man present in France for almost thirty years, because at his prefecture interview he had been unable to answer simple questions on the history, culture and institutions of the Republic: as the court recorded, “il ne connaissait pas les dates des deux guerres mondiales, la signification et l’ann\u00e9e de la r\u00e9volution fran\u00e7aise, ne savait pas qui \u00e9tait Charles de Gaulle, qu’il ne connaissait ni les symboles de la R\u00e9publique, ni le nom de l’hymne national, n’a pas su expliquer la devise de la France”. Thirty years of residence did not compensate for that record. Read the full reasoning at CAA Nantes, 13 January 2026, no. 25NT00012<\/a>. A year earlier, the same court confirmed the rejection of a woman established in France since 2003 who did not know the name of the national anthem, the meaning of the 14th of July, the name of French rivers, the countries bordering France, or even the name of the mayor of her own commune, and could not define fraternity; schooling or no schooling, her knowledge of national history, social life and citizenship remained patchy and insufficient. See CAA Nantes, 1 April 2025, no. 24NT00350<\/a>.<\/p>\n

The lesson for a British candidate is blunt but useful. The interview is not a friendly chat about your love of France; it is an examination with a written record, and the record is what the minister and later the judge will read. Prepare it like an examination: the dates and meaning of the Revolution and the two world wars, the Fifth Republic and its presidents starting with de Gaulle, the motto, the anthem (the Marseillaise), the symbols of the Republic, the regions and departments including your own, the mayor of your commune, the European Union and France’s place in it, and the rights and duties of citizenship including voting and the principle of la\u00efcit\u00e9<\/em> (secularism). Bring proof of everything the file claims, keep copies of everything you submit, and if the interview goes badly, write down immediately afterwards what was asked and answered while it is fresh: that note may become evidence if you challenge the decision. One further formality for younger readers: a young man who becomes French between sixteen and twenty-five must register for the national census and defence day within one month of acquiring nationality, as recalled on the official naturalisation procedure page<\/a>; parents of teenage boys should plan for it.<\/p>\n

II. My naturalisation was refused or adjourned: how do I challenge the decision and within what deadline?<\/h2>\n

A. What is the compulsory appeal to the minister, and how do I file it within two months?<\/h3>\n

Every challenge to a naturalisation refusal or adjournment begins with the same mandatory step, and missing it ends the case before it starts. The ministry of the interior states the rule without ambiguity: anyone wishing to contest a prefect’s decision of inadmissibility, rejection or adjournment must first lodge a compulsory prior administrative appeal (RAPO) with the ministry of the interior. The same page adds the consequence: only the rejection of that prior appeal can then be taken to the administrative judge. A direct court application against the prefect’s decision, without going through the minister, is inadmissible and will be thrown out. The full procedure is set out on the ministry’s litigation page for access to French nationality<\/a>. Note the vocabulary: this first appeal is administrative, addressed to the minister, and in practice it goes to the sub-directorate for access to French nationality (sous-direction de l’acc\u00e8s \u00e0 la nationalit\u00e9 fran\u00e7aise<\/em>) in Rez\u00e9, near Nantes, which decides for the minister.<\/p>\n

The deadline is two months from notification of the adverse decision, and the method depends on how you filed. If you applied online, which is now the normal route including for Paris and \u00cele-de-France residents, the decision is notified in your personal online space under your notifications, and your appeal must be lodged through the form provided in that same space; service-public warns that an appeal sent by another channel may be declared inadmissible unless genuine technical impossibility is shown. If you filed on paper, the decision comes by registered letter or summons to the prefecture, and the appeal goes by post to the ministry in Rez\u00e9 or by the indicated email channel. In both cases, count the two months from the day you were notified, keep proof of sending, and use the appeal to do what the initial file failed to do: attach the missing diploma, the new TCF certificate, the payslips proving stable resources, the evidence that the spouse has now joined you in France, the mayor’s attestation, the proof the fine is paid. The minister re-examines the whole file, and a well-documented prior appeal sometimes succeeds on its own, which is faster and cheaper than any court case. If the minister answers negatively, or says nothing for four months, which counts as an implied rejection, you then have a fresh two months to go to court. Service-public summarises the sequence: after a negative answer, or after four months without a reply from the date your appeal was received, you have two months to bring court proceedings before the Administrative Court of Nantes. Mark three dates on receipt of any refusal: the two-month appeal deadline, the four-month silence point, and the two-month court deadline after that.<\/p>\n

Two strategic points before you write the appeal. First, identify exactly what the decision reproaches you with, because the motivation (motivation<\/em>, the stated legal and factual reasons, which the decision must contain) dictates your evidence. A rejection for insufficient assimilation calls for language certificates and preparation for a possible second interview; an adjournment for professional integration calls for an employment contract and payslips at the end of the waiting period; a rejection grounded on a criminal conviction calls for proof of its age, its minor character, payment, and years of clean conduct since. Generic letters about loving France change nothing; targeted documents sometimes change everything. Second, remember the re-application bars recalled in Part I: a new application within five years of a rejection may be closed without examination unless new circumstances are shown, and a new application before an adjournment period expires will be dismissed. The prior appeal to the minister is therefore usually better than immediately refiling, because it attacks the existing decision within its deadlines instead of starting a weaker second file under the shadow of the first.<\/p>\n

One reassurance for British applicants runs through all of this: applying for French nationality does not endanger your British citizenship. The United Kingdom expressly permits it. As the official gov.uk page<\/a> explains, the United Kingdom allows dual citizenship, so you can apply for French citizenship and keep your British citizenship without any separate dual-citizenship application. The statutory French conditions verified above contain no requirement to renounce your British passport either. One practical consequence of holding both nationalities is worth knowing now: a dual British-French national in France cannot obtain British diplomatic help while on French soil. In France you will be treated as French, which is precisely the point of the exercise: voting rights, unconditional residence, and European Union citizenship recovered.<\/p>\n

B. When will the administrative court in Nantes overturn a refusal or adjournment?<\/h3>\n

If the minister confirms the refusal expressly or by four months of silence, the case moves to the courts, and here French law gives naturalisation litigation an unusual and convenient shape. The ministry confirms that the administrative court of Nantes alone hears cases about naturalisation and reintegration decisions, wherever the applicant lives, because the minister’s nationality services are based in its area. The administrative court of Nantes alone hears these cases, wherever you live, because the minister’s nationality services sit in its area. A British resident of Paris, Nice or Bordeaux files in Nantes, not locally; appeals go to the Nantes appeal court, and cassation appeals (pourvois en cassation<\/em>) go to the Conseil d’\u00c9tat, France’s supreme administrative court: Appeals go to the Nantes administrative appeal court, whether brought by applicants or by the minister, and cassation appeals against its rulings go to the Conseil d’\u00c9tat. The two-month deadline runs from notification of the minister’s rejection, express or implied, and the application must state precise legal grounds with supporting documents; this is full administrative litigation where the judge examines the file, not a rubber stamp.<\/p>\n

To win, you must understand the standard the judge applies, because it is deliberately deferential. Naturalisation is, in the courts’ constant phrase, a favour and not a right. The Nantes appeal court restated it in 2025: “la nationalit\u00e9 fran\u00e7aise, laquelle n’est pas un droit mais une faveur accord\u00e9e par l’Etat”. French nationality is not a right but a favour granted by the State. The minister, the court explains, “dispose d’un large pouvoir d’appr\u00e9cier l’opportunit\u00e9 d’accorder la nationalit\u00e9 fran\u00e7aise”, enjoys broad power to assess whether granting nationality is opportune, and the judge therefore annuls only for legal error, factual error, procedural defect, misuse of power, or manifest error of assessment (erreur manifeste d’appr\u00e9ciation<\/em>). In plain terms, the judge does not substitute his own view of whether you deserve nationality; he checks whether the minister’s view was legally tenable on the evidence. That is why the two 2025 and 2026 confirmations summarised in Part I failed: once the interview record showed a genuinely patchy knowledge of the Republic, confirming the rejection involved no manifest error, however long the residence. Read the governing framework in the courts’ own words: “il appartient au ministre charg\u00e9 des naturalisations de porter une appr\u00e9ciation sur l’int\u00e9r\u00eat d’accorder la nationalit\u00e9 fran\u00e7aise \u00e0 l’\u00e9tranger qui la sollicite. Dans le cadre de cet examen d’opportunit\u00e9, il peut l\u00e9galement prendre en compte le degr\u00e9 d’assimilation \u00e0 la soci\u00e9t\u00e9 fran\u00e7aise du postulant.” It is for the minister to assess the interest of granting nationality, and he may lawfully weigh the applicant’s degree of assimilation. That passage comes from CAA Nantes, 13 January 2026, no. 25NT00012<\/a>, and the same court applied the same test when it confirmed a rejection turned adjournment in CAA Nantes, 1 April 2025, no. 24NT00350<\/a>.<\/p>\n

But deference has limits, and a September 2026 decision shows exactly where they lie, in reasoning every British applicant with an old minor conviction should read. A woman resident in France for fourteen years had her application adjourned for two years because of repeated travel without a valid ticket on public transport over six months in 2015, punished by a 200-euro fine in a 2017 criminal order. The Nantes court first annulled the adjournment, then the appeal court rejected the minister’s appeal, holding: “ces faits, qui se sont d\u00e9roul\u00e9s sur une p\u00e9riode limit\u00e9e de six mois, ont \u00e9t\u00e9 commis pr\u00e8s de huit ans avant l’\u00e9diction de la d\u00e9cision contest\u00e9e et il ne ressort pas des pi\u00e8ces du dossier que Mme C…, qui r\u00e9sidait en France depuis quatorze ans \u00e0 cette date, se serait rendue coupable d’une autre infraction depuis lors. Dans ces conditions, compte tenu de la nature et de l’anciennet\u00e9 des faits en cause, et contrairement \u00e0 ce que soutient le ministre de l’int\u00e9rieur, la d\u00e9cision ajournant \u00e0 deux ans la demande de naturalisation de Mme C… pour le motif mentionn\u00e9 au point 3 est entach\u00e9e d’erreur manifeste d’appr\u00e9ciation.” Facts confined to six months, committed nearly eight years before the decision, no reoffending since, fourteen years of residence: maintaining a two-year adjournment on that basis was a manifest error of assessment. See CAA Nantes, 18 September 2026, no. 25NT03148<\/a>, confirming the annulment ordered by the Nantes court on 21 October 2025 with an order to re-examine within six months.<\/p>\n

That decision is your practical template. Judges overturn where the file shows disproportionality between an old, minor, isolated incident and the sanction of refusal or adjournment; where the interview record is thin, contradictory or missing and the minister’s conclusion does not follow from it; where the reasoning confuses the legal categories, for example treating unmet legal conditions as a discretionary rejection without saying so; or where the minister never genuinely examined your situation as a whole, which the courts expressly verify. They do not overturn because you have lived in France for decades, because your children are French, because Brexit was unfair, or because you feel integrated: the 2026 confirmation is explicit that long presence, republican values and a clean criminal record do not cure a failed assimilation assessment. Remedies follow the same realism. The judge does not naturalise you himself; he annuls the decision and usually orders the minister to re-examine within a set time, sometimes under penalty payments (astreinte<\/em>), and may award costs against the State under article L. 761-1 of the administrative justice code, as all three appeal decisions illustrate. File your court application with the complete story the minister should have weighed: the timeline of residence with passports and tax notices, the language certificate with its date, the clean record since the old facts, the family rooted in France, and a precise explanation of why the stated ground cannot support the decision. And keep every deadline: two months for the minister, four months of silence, two months for Nantes, each running from notification, each fatal if missed.<\/p>\n

Conclusion<\/h2>\n

A refused or adjourned naturalisation is a serious setback for a British resident, but it is a reasoned administrative decision, not a verdict on your life in France, and the law organises the answer step by step. Check first which of the three decisions you received and on which ground, because inadmissibility, rejection and adjournment call for different evidence and different timing. Lodge the compulsory appeal to the minister within two months, through the right channel, with the documents that cure the stated defect. If the minister says no or stays silent for four months, take the rejection to the administrative court of Nantes within two months, arguing precisely where the assessment was manifestly wrong, as the September 2026 annulment shows can succeed against an old minor record, and as the 2025 and 2026 confirmations show will fail where the assimilation interview genuinely went badly. Prepare the language to B2, prepare the interview like the examination it is, keep your conduct and your file beyond reproach, and treat every deadline as absolute. Nationality remains a favour of the French State, but a favour granted under law, with reasons, delays and a judge at the end of the road.<\/p>\n","protected":false},"excerpt":{"rendered":"

Your French naturalisation was refused or adjourned after Brexit. 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