Can a UK Civil Partnership count in France after Brexit? In most cases, a civil partnership properly registered in the United Kingdom can produce legal and tax effects in France. That answer does not mean that France silently converts the partnership into a French PACS, gives the partners the status of spouses, or grants a residence permit. The practical question is more precise: which UK authority registered the partnership, what does the certificate prove, which legal effects are requested in France, and what documents will the French authority accept?
For French purposes, a PACS (pacte civil de solidarité) is a French civil solidarity pact: a registered contractual status for organising a couple’s common life. A UK civil partnership is a different foreign registered partnership. After Brexit, the recognition analysis remains a matter of French private international law, French tax rules and the law of the UK registration authority. This guide explains the evidence, tax, property, succession, residence and separation issues that a British couple should address before submitting a certificate to a mairie (town hall), tax office, notary or prefecture. It does not cover the purchase of a French property or the creation of a company.
I. Does France recognise a UK civil partnership after Brexit, and what proof does a British couple need?
A. Is a UK civil partnership the same as a French PACS, and which law applies?
The starting point is the status of the union. A UK Civil Partnership is a legal relationship created by registration under the law of the relevant part of the United Kingdom. The certificate may therefore refer to England and Wales, Scotland or Northern Ireland, and the authority issuing it matters. The couple should not describe the document merely as a “partnership agreement” if it is a registered civil-status event. Conversely, a private cohabitation agreement, an unregistered declaration or a financial arrangement is not necessarily a civil partnership.
The French Code civil gives a foreign registered partnership its own connecting rule. Article 515-7-1 states: “Les conditions de formation et les effets d’un partenariat enregistré”. The remainder of the provision submits the formation conditions, effects, and causes and effects of dissolution to the substantive law of the State of the authority that registered the partnership. The full rule is available in Article 515-7-1 of the Code civil. This is the reason a French authority may need to know the UK jurisdiction of registration and the UK legal consequences of the partnership instead of applying French PACS rules mechanically.
The French PACS provides a useful comparison, but it is not a conversion mechanism. Article 515-1 describes it as “Un pacte civil de solidarité est un contrat conclu par deux personnes physiques majeures”. The definition continues by referring to two adults, of different or the same sex, organising their common life. It is a French legal status with its own registration, property and dissolution rules. The definition can be read in Article 515-1 of the Code civil. A UK Civil Partnership may be treated as a foreign registered partnership with analogous effects for a particular French issue, but the certificate does not become a French PACS certificate.
Recognition also has limits. French public policy, or ordre public, means the fundamental principles that French law will not set aside merely because a foreign legal status is invoked. The French tax authority explains that a foreign civil partnership has effects in France provided it does not conflict with public policy. For a French PACS, Article 515-2 begins: “A peine de nullité, il ne peut y avoir de pacte civil de solidarité”. It then lists prohibited relationships, including an existing marriage or another PACS. That provision is in Article 515-2 of the Code civil. A French office may therefore ask whether one partner was already married, whether the UK registration was valid, whether the partnership has been dissolved, or whether the certificate has been altered.
Brexit does not by itself erase this private-international-law route. Article 515-7-1 is not limited to partnerships registered in an EU Member State. Its focus is the foreign authority that registered the partnership and the law governing that partnership. Brexit does, however, make old advice about EU free movement unsafe. Recognition of a civil status and entitlement to enter or remain in France are separate legal questions. The certificate may prove a family relationship without creating a right to reside.
The date must be fixed carefully. A couple may have registered in the UK years before moving to France, changed address, changed names, amended their partnership or separated informally without completing a legal dissolution. For each French request, record the date of registration, the registration authority, any amendment date and any dissolution date. A French tax return, a succession opening, a residence application and a bank compliance review may each ask about a different point in time.
The French rule for the domestic PACS illustrates why timing matters. Article 515-3-1 says: “Le pacte civil de solidarité ne prend effet entre les parties qu’à compter de son enregistrement”. The provision also distinguishes effects between the partners from enforceability against third parties after publication. It appears in Article 515-3-1 of the Code civil. A UK partnership is not governed by this French registration provision, but a bank, notary or tax office will still need reliable evidence of the foreign event’s date and public character.
The distinction is important in four recurring situations. First, a French notary may need the partnership status to determine who must be informed of a transaction or succession. Secondly, the tax administration may need to know whether the couple forms one tax household for a particular year. Thirdly, a prefecture may ask whether the relationship is legally established when assessing a residence application. Fourthly, a court may need the governing law and the dissolution status before deciding whether a financial claim is between partners or former partners. The same certificate can be relevant in all four files, but it does not answer all four questions.
For the wider practical steps involved when two British citizens create a French PACS, see the firm’s guide to PACS registration documents, apostille and inheritance after Brexit. That page is the cluster’s existing hub for a French PACS. This article addresses the distinct question of an already registered UK Civil Partnership and links back to the hub so that the two subjects are not confused.
The couple should therefore ask the receiving authority to identify the requested legal effect. “Please recognise our civil partnership” is too broad for a difficult file. A better request says, for example, “Please record our status for the French income-tax household from the UK registration date”, “Please accept the partnership certificate for the succession file”, or “Please explain whether the certificate is sufficient for this residence application”. The authority’s answer will show whether the issue is recognition, proof, translation, tax assimilation, immigration or a separate property question.
B. Which certificate, apostille and translation should be sent to a French authority?
The evidence file should begin with the complete official certificate issued by the competent UK authority. A short commemorative document or a scan downloaded from an account may not contain enough information. Request the version that identifies both partners, the date and place of registration, the authority, the registration number where one exists, and any amendment or dissolution. If the couple registered in Scotland, England and Wales or Northern Ireland, identify that jurisdiction in the covering letter rather than leaving the French recipient to guess.
The certificate should be accompanied by a clear chain of identity. Include the passports or identity cards used in the French procedure, birth certificates if requested, documents explaining a change of name, and evidence of the termination of a previous marriage or civil partnership. If the names differ between the certificate and a passport, explain whether the difference comes from a married name, a deed poll, a middle name, transliteration or an administrative error. Do not silently “correct” the certificate in the translation.
French authorities may also ask for an official statement of the applicable UK law or a legal opinion explaining the partnership’s effects. This is often necessary when a French notary must understand the property regime, when a tax office must determine whether the relationship is comparable to a PACS, or when a court must decide whether a dissolution has already taken effect. The document should identify the UK legislation and the registration jurisdiction. A generic internet explanation of civil partnerships is not a substitute for a document tied to the couple’s actual registration.
An apostille is an authentication certificate used under the Hague system. It confirms the origin of a public document; it does not translate the document and does not decide whether France recognises the underlying legal relationship. The British government’s guidance on documents for British nationals abroad explains the role of an apostille and the need to check the receiving country’s requirements. Read the current GOV.UK guidance on documents for British people abroad before ordering legalisation. Ask the French mairie, notary, tax office or prefecture whether an apostille is required for the exact document and purpose. An apostille obtained for one document does not authenticate a different document.
The translation must be complete and faithful. A traducteur assermenté, meaning a court-approved or officially recognised translator for the relevant French procedure, should translate the certificate and material annexes where required. The translation should preserve names, dates, registration numbers, stamps and references. The British government states that British embassies and consulates do not provide translations and directs people to find a qualified translator. That point is recorded in the GOV.UK guidance on documents for British people abroad. Keep the original, the apostilled copy if any, the translation and proof of delivery together.
The receiving office may ask for a French document that has no exact UK equivalent. A common example is a certificat de coutume, meaning a legal statement describing the foreign law applicable to a person’s status. Another is a certificate of celibacy or capacity to marry. A UK Civil Partnership certificate is not a certificate of celibacy, and a British national may not be able to obtain the exact French form. The British Embassy’s official self-declaration guidance explains that British nationals may need to provide a self-declaration or explanatory note when the UK does not issue the certificate requested by a French mairie. The relevant GOV.UK self-declaration form for marriage or civil partnership in France should be read together with the mairie’s current document list.
Do not confuse two procedures. A couple already holding a UK Civil Partnership is asking France to recognise the legal effects of an existing foreign partnership. A couple deciding to create a French PACS is making a new French declaration before the competent civil-status authority or notary. The GOV.UK page describes PACS as the French version of civil partnership and explains that the mairie should be contacted for the French procedure. That information is useful for comparison, but it does not require a couple with an existing UK partnership to register a second status. Registering a second status without advice could create a conflict of dates, duplicate obligations or an avoidable dissolution problem.
Article 47 of the Code civil provides an evidential reference point for foreign civil-status acts. It says that an act “fait en pays étranger et rédigé dans les formes usitées dans ce pays fait foi”, subject to verification where other evidence shows irregularity, falsification or a mismatch with reality. The current text is in Article 47 of the Code civil. This does not prevent a French authority from asking for an apostille, translation or additional proof. It means that a properly issued foreign document should be examined through an evidence-based process rather than dismissed merely because its format is unfamiliar.
The practical submission should contain an indexed bundle. Put the certificate and its translation first, then identity documents, name-change documents, prior relationship documents, the UK legal explanation, any apostille, and a short chronology. Add a one-page request identifying the French authority, the legal effect sought and the date from which it is sought. If another institution has already accepted the certificate, include that response only as supporting context; one institution’s decision does not bind another.
When a French office says that the document is “not recognised”, ask what that means. It may mean that the document is not readable, that the translation is missing, that an apostille was expected, that the office cannot determine the registration jurisdiction, that the office requires evidence of UK law, or that the requested legal effect is not automatic. Ask for the legal basis and the missing document in writing. The next action is different for each answer.
If the refusal is informal, send a concise written request for reconsideration with the complete bundle. Keep the email headers, submission receipt, postal proof and the date of any appointment. If the office makes a formal decision, preserve the decision and the notification envelope. Do not rely on a telephone statement when a residence, tax or succession deadline is running. A lawyer can then assess the appropriate administrative, judicial, notarial or foreign-law response.
II. What do recognition, tax, inheritance and separation change for a British couple in France?
A. Does recognition change joint taxation, property, debts or inheritance?
Recognition has a clear tax consequence when the French administration accepts that the foreign partnership is legally comparable to a PACS for the tax in question. The official French tax guidance says: “Le partenariat civil conclu à l’étranger a des effets en France”. It then requires proof of the partnership’s existence, registration date and legal regime before the administration can apply the relevant tax treatment. The public guidance is available on impots.gouv.fr concerning a marriage or PACS concluded abroad.
The BOFiP, the French tax administration’s published tax doctrine, is more specific. It identifies the British “civil partnership” among foreign partnerships capable of producing legal consequences in France. Its rule is that, where a foreign civil partnership is recognised under Article 515-7-1 of the Code civil or an international convention and meets the same conditions as a PACS, the income-tax rules applicable to PACS partners are used. See BOFiP, BOI-IR-CHAMP-20-10. The practical effect is not an automatic tax label: the couple must prove the status and ask the tax office to apply it to the relevant tax year.
The French income tax rule for a PACS is in Article 6 of the Code général des impôts. The text says that the partners are subject to “une imposition commune”, meaning joint income taxation, for the income covered by the provision. The current Article 6 of the Code général des impôts also contains special rules for the year in which the marriage or PACS is concluded and for the year of dissolution. A British couple should not copy those mechanics into a UK partnership file without first obtaining the French administration’s confirmation that the foreign partnership has been assimilated for the particular purpose.
The date is especially important. If the partnership was registered during a tax year, the couple may need to establish the registration date, the period of French tax residence for each partner and the date on which the French tax household changed. If one partner remained resident in the United Kingdom, the France–UK tax treaty and domestic residence rules still need to be analysed. Civil status does not decide tax residence. The partnership also does not turn UK income into French-source income, or eliminate reporting obligations in the United Kingdom.
The couple should separate four questions in correspondence with the tax office: whether the partnership is recognised in civil law; whether it is assimilated to a PACS for French income tax; how the date affects the filing year; and how the treaty allocates each category of income. The same approach applies to pension income, dividends, interest, rental income and gains. Preserve UK tax statements, French returns, withholding certificates and evidence of residence. A joint filing position should be supported by the certificate and the administration’s response, not by the English translation of the words “civil partnership” alone.
The tax effect does not settle ownership. Under the French domestic PACS regime, Article 515-4 says: “Les partenaires liés par un pacte civil de solidarité s’engagent à une vie commune”. It also contains rules on mutual assistance and liability for certain ordinary household debts. The text is in Article 515-4 of the Code civil. A UK Civil Partnership is governed for its effects by the law identified through Article 515-7-1. The French PACS rule is therefore a comparison point, not permission to assume that every UK partnership carries precisely the same debt consequences.
Property must be analysed from the title, the source of funds, the partnership agreement and the law governing the foreign partnership. Article 515-5 for a French PACS begins with the principle that each partner retains the administration and enjoyment of personal property; it also says: “Chacun des partenaires peut prouver par tous les moyens” that a property is exclusively theirs. See Article 515-5 of the Code civil. Those are domestic PACS rules. They do not rewrite a French land-register entry or a mortgage deed merely because a UK partnership certificate is shown to a notary.
If a French home is registered in one partner’s name, the couple should ask whether the UK partnership creates a claim between the partners, a contribution claim, a right to occupy, or no proprietary change. If the home is registered in both names, the deed and the stated shares remain central. If funds were transferred between partners, retain bank statements and the purpose of each transfer. A lender may require both partners to sign a document, but that requirement is not proof that the foreign partnership changes the ownership shares.
The French PACS has an optional indivision regime, meaning ownership in undivided shares. Article 515-5-1 says: “Ces biens sont alors réputés indivis par moitié”. The rule is set out in Article 515-5-1 of the Code civil. The existence of that French option is one reason a notary may ask for the UK partnership agreement and applicable law before advising on a French asset. A British couple should not assume that the French presumption applies to a UK Civil Partnership, or that the UK partnership agreement can be ignored because the couple lives in France.
The Cour de cassation’s decision of 1 October 2025, no. 23-22.353, shows how carefully a French court reads a PACS property rule. The decision repeats that, under Article 515-5, certain assets acquired for value after the PACS are “présumés indivis par moitié”. The judgment is available from the official Légifrance record for Cour de cassation, première chambre civile, 1 October 2025, no. 23-22.353. This is a French PACS decision, not a ruling that every UK Civil Partnership is governed by Article 515-5. Its value is methodological: ownership, the acquisition act and the partnership regime must be matched rather than inferred from the couple’s label.
Household debts need the same caution. A partner may have signed a loan, guarantee, lease, utility contract or tax mandate individually. The other partner’s exposure depends on the contract, the applicable partnership law and any French mandatory rule. A French creditor may ask whether the debt was for ordinary household needs. A UK creditor may apply a different test. Obtain the contract and the relevant UK-law explanation before telling a creditor that the other partner is liable or protected.
Inheritance is a separate question from tax. Article 796-0 bis of the Code général des impôts provides: “Sont exonérés de droits de mutation par décès le conjoint survivant et le partenaire lié au défunt par un pacte civil de solidarité.” The provision is available in Article 796-0 bis of the Code général des impôts. The BOFiP guidance extends the PACS inheritance-tax treatment to a foreign civil partnership when the partnership is regularly established, recognised and not contrary to public policy. The exemption from French inheritance tax does not make the surviving partner an heir, transfer ownership of a French home or remove the need for a will.
For a French PACS, Article 515-6 says that the surviving partner receives the specified protection where the deceased “l’a expressément prévu par testament”. The full provision is in Article 515-6 of the Code civil. The exact succession rights of a UK Civil Partner must be tested against the law governing the partnership, the applicable succession law, the location and ownership of each asset, any choice of law, and the existence of a valid will. A UK Civil Partnership certificate should therefore be sent to the notary with the will and an asset schedule, not presented as a replacement for either.
The couple should review the existing French guide on whether a UK will works in France after Brexit as part of that succession file. The link concerns the will and choice-of-law question; this article concerns the civil partnership. A will, pension nomination, life-insurance beneficiary form and property deed should be compared for consistency. “My partner” may not have the same legal meaning in every document, particularly after a move, a later dissolution or a change of name.
The Cour de cassation’s commercial chamber decision of 29 May 2024, no. 22-24.008, is a useful warning against relying on a status label without evidence. In that case, the tax dispute involved “le caractère fictif du PACS”, and the Court accepted that the tax administration could use the succession declaration and surrounding facts to assess the issue. The official Légifrance record for Cour de cassation, commercial chamber, 29 May 2024, no. 22-24.008 records the exact number and the reasoning. The case did not concern a British Civil Partnership. It shows why the survivor should retain the official certificate, evidence of the relationship, the will, residence history and consistent declarations when claiming a tax benefit.
Do not claim the inheritance-tax exemption before checking the full conditions. A tax office may ask for the foreign certificate, the translation, proof of registration date, evidence of the legal regime, the will and the identity of the beneficiary. It may also ask why a foreign partnership should be treated as comparable to a PACS. If the answer requires foreign-law analysis, ask for a written legal opinion identifying the applicable UK legislation instead of sending an informal paragraph copied from a website.
B. What happens after separation, and can the partnership create French residence rights?
A relationship breakdown is not the same as legal dissolution. Under Article 515-7-1, the causes and effects of dissolution are governed by the substantive law of the State of the registering authority. A couple living apart in France may therefore still be legally partnered under the relevant UK process. Conversely, a UK dissolution may have taken effect on a date that French institutions do not know. Determine the competent UK authority, the permitted route, the effective date and the document that proves dissolution before notifying French institutions.
The domestic French PACS procedure demonstrates why a date cannot be guessed. Article 515-7 states: “Le pacte civil de solidarité se dissout par la mort de l’un des partenaires ou par le mariage des partenaires”. It then sets out joint declaration, unilateral notice, registration and publication rules. Read Article 515-7 of the Code civil. Those formalities apply to a French PACS. They are not a substitute for the UK procedure where the relationship is a UK Civil Partnership. A couple should not send a French PACS dissolution form unless a separate French PACS actually exists.
After a UK dissolution, obtain the official dissolution record, an apostille or other authentication if requested, and a sworn French translation where required. Send a dated notice to the French tax office, bank, insurer, pension provider, health-insurance file, family-benefit file, notary and any authority that recorded the partnership. Ask each institution what date it will use. Keep proof of the notification and copies of the documents; a later tax or succession dispute may turn on the difference between the separation date, the UK dissolution date and the date on which a French institution updated its file.
Review the financial consequences before transferring money or closing a joint account. Separate the partner’s personal assets, jointly held assets, contributions, ordinary household debts, guarantees and any claim arising from the partnership agreement. If there is a French property, a loan or a business interest, obtain advice before signing a release or transfer. The legal classification of a payment may affect tax, succession and limitation issues. A payment described as “just settling up” may be a reimbursement, a gift, a contribution to a jointly held asset or a settlement under the partnership law.
Update wills and beneficiary nominations as soon as the relationship changes. A former civil partner may remain named on a UK pension, life-insurance policy or investment account even after dissolution. A French will may contain a legacy that no longer reflects the person’s intention. A new will must be checked against children’s rights, any reserved share, the applicable succession law and the location of the assets. Do not rely on the dissolution certificate alone to cancel a beneficiary designation.
Residence requires a separate analysis. A recognised family relationship can be relevant to a French application, but recognition of a UK Civil Partnership is not itself a French residence permit. A British citizen who did not have an established Withdrawal Agreement residence position cannot treat the partnership certificate as a general exemption from post-Brexit visa rules. The visa or residence route depends on the applicant’s situation, the other partner’s nationality and status, the place of residence, the intended duration, resources, health cover and the legal basis invoked.
If the British partner already holds a residence right under the Withdrawal Agreement, preserve the evidence for that right: the residence document, the application history, proof of residence and any correspondence with the prefecture. The partnership may be relevant to a later family or personal-status file, but it should not replace the documents proving the existing residence basis. If the British partner is applying for a new route, identify the route before relying on the partnership. A French official may accept the certificate for one question while still requiring a visa for another.
The Conseil d’État’s decision of 22 October 2018, no. 407687, illustrates the danger of treating a PACS as automatically equivalent to marriage in an immigration context. The Court referred to “les différences organisées par la loi entre ces deux formes d’union”. The official Légifrance record for Conseil d’État, 22 October 2018, no. 407687 concerned the EU-law position of a PACS and should not be read as a direct ruling on every British applicant after Brexit. Its broader lesson remains relevant: a civil partnership, a PACS and a marriage can have different immigration consequences, even when each is a legally recognised relationship.
The residence file should therefore answer five separate questions. Is the partnership valid and evidenced? Is the applicant relying on a French, UK, Withdrawal Agreement, family or another immigration route? Who is the sponsor or qualifying family member? What date and period of residence must be proved? Which authority has jurisdiction and what appeal deadline applies if the application is refused? An online form that rejects a certificate may show a technical problem; a written decision may raise a legal problem. Save screenshots, portal messages, appointment confirmations, receipts and the exact version of every uploaded document.
If a prefecture or visa authority says that a UK Civil Partnership is not accepted, request the written legal basis. The response should identify whether the issue is the authenticity of the document, lack of apostille, missing translation, uncertainty about the registration jurisdiction, failure to prove the applicable UK law, lack of a qualifying immigration route or a substantive refusal. Attach the official certificate, translation and explanation in one indexed bundle. Do not argue that “PACS means civil partnership” without addressing the route’s actual legal conditions.
If the authority refuses to give reasons, submit a written request through the published channel and keep proof. If a formal refusal is notified, calculate the remedy deadline from the notification and check whether a prior administrative complaint is useful or mandatory. A French residence refusal and a UK dissolution decision may involve different authorities, courts and deadlines. A French lawyer can coordinate the evidence without pretending that one appeal replaces the other.
There is also a daily-administration stage. Tell the tax office whether the household status has changed. Notify the CPAM, the French health-insurance fund, only on the basis relevant to healthcare entitlement. Update CAF, the family-benefit body, where the household circumstances affect a claim. Inform the bank and insurer, but ask whether they require a certificate, a dissolution record or a beneficiary change form. Update the notary’s succession file and the property records if an instrument has actually changed ownership. A partnership certificate is evidence of status, not evidence of every consequence claimed by a third party.
For a French tax file, write a short chronology: UK registration date, move to France, French tax-residence date, first French declaration, any request to assimilate the partnership to a PACS, the date of separation and the date of UK dissolution. For a succession file, add death date, asset location, ownership, will date, children, previous relationships and the surviving partner’s intended claim. For a residence file, add entry dates, permits, applications, the sponsor’s status and the exact route. Separate chronologies reduce the risk that a statement made for tax is accidentally treated as an admission in an immigration or succession dispute.
If the couple lives in Paris or Île-de-France, local appointment channels can affect the practical handling of the file even though the governing rules are national. Record which mairie, notary, tax service or prefecture accepted the file, the appointment date, the upload channel and the list of documents supplied. Do not assume that a neighbouring commune or a different prefecture has the same workflow. The local channel may change the time needed to obtain a written answer, but it does not replace the national legal analysis.
The most reliable response to a refusal is a focused evidence matrix. In one column, quote the authority’s request. In the next, identify the document that answers it. In a third, explain the legal point: validity, registration date, UK governing law, translation, authentication, tax assimilation or residence route. In the final column, record the date of submission and proof of delivery. This format prevents the couple from sending ten documents that answer none of the actual objections.
Before signing a declaration, check every date and status statement against the certificate and the UK record. A statement that the couple is “still partnered” may be wrong if a dissolution has taken effect. A statement that the partnership is “equivalent to marriage” may overstate the law. A statement that the partners are “joint owners” may conflict with the French deed. Accuracy is more useful than a broad translation designed to sound familiar to a French office.
The final decision should be made on the requested consequence, not on the label. For tax, prove recognition and assimilation. For a French property or debt, prove title, funds, contract and the partnership regime. For inheritance, prove the will, applicable succession law and tax conditions. For separation, prove the UK dissolution and effective date. For residence, prove the independent visa or residence route. The UK Civil Partnership certificate is often the first document in each file, but it is rarely the last.
Conclusion
A UK Civil Partnership can count in France after Brexit when it was properly registered, can be proved, and is not contrary to French public policy. The controlling analysis is not a simple French translation of the words “civil partnership”. It identifies the UK registration authority, applies Article 515-7-1 of the Code civil, establishes the registration or dissolution date, and then examines the specific consequence requested in France. The result can be favourable for tax and succession purposes while remaining insufficient for a residence permit or a property claim.
Prepare the complete certificate, the identity and name-change chain, the evidence of any prior relationship, the UK-law explanation, the apostille if requested and a faithful French translation. Ask the mairie, tax office, notary or prefecture to state the exact legal effect and missing document. Keep separate files for civil status, tax, property, succession, separation and residence. If a refusal arrives, preserve the notification and calculate the relevant deadline rather than relying on an informal answer.
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