Under French law, declaring an address at a third party’s place (friend, relative, acquaintance) to receive mail is a regulated but permitted practice. The fundamental distinction lies in the type of residence: personal or professional, each subject to different rules.
Declarative principle of personal address in France
French law is based on a declarative principle of address. A person who declares an address to public administrations or social organizations, including at a third party’s place, is not required to provide proof of residence. This principle covers access to all social rights, including State Medical Aid (AME).
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In practice, administrations are prohibited from requiring proof of residence from a person declaring an address or imposing administrative residence via a CCAS. The only real condition is that the address allows for regular mail receipt. This legal framework particularly protects individuals without stable housing, but it applies to all natural persons.
Before considering this step, it is useful to understand what it means to have a postal address at a friend’s place from a legal standpoint, both for the hosted person and the host.
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Host’s consent: what the law really requires
Receiving mail at a friend’s place requires explicit agreement from that person. No law sets a standard form, but in practice, the host writes a sworn statement confirming that they authorize mail receipt at their address.
This statement is particularly important in the face of certain organizations (banks, insurance companies, tax administrations) that, despite the declarative principle, sometimes request proof. The document must mention the full identity of both parties, the address in question, and the date. Adding a copy of the host’s ID strengthens its admissibility.
The host does not become liable for the obligations of the domiciled person. They are not responsible for their debts, taxes, or any potential disputes. Their responsibility is limited to forwarding the received mail.
Personal residence at a friend’s place and tax implications
Declaring an address at a friend’s place changes the tax attachment. The tax administration considers the declared residence as the place of taxation. Several consequences follow:
- The housing tax (for secondary residences) and property tax do not change the liable party: they remain the responsibility of the owner or the tenant holding the lease.
- The person domiciled at a friend’s place must declare this address as their primary residence to the competent tax office, under penalty of inconsistency between tax databases.
- If two unrelated adults share the same tax address, each is taxed separately on their own income, unless a voluntary declaration of cohabitation (PACS or marriage) is made.
The Official Bulletin of Public Finances (BOFiP), updated in March 2025, reminds that the tax residence is assessed based on the actual primary place of stay, not solely according to the postal address. A person who declares living at a friend’s place but resides elsewhere is subject to reassessment.
Business residence at a friend’s place: stricter rules
The framework changes radically for entrepreneurs. Domiciling the head office of a business at a third party’s place is possible, but under specific conditions that vary depending on the occupancy status of the housing.
If the friend is the owner, they can authorize the domiciliation by simple written agreement. If the friend is a tenant, the rental lease must not prohibit the exercise of a professional activity or business domiciliation. In co-ownership, the co-ownership regulations must be checked.
A verbal agreement is not sufficient for professional domiciliation. The commercial court registries require proof of enjoyment of the premises at the time of registration. Without a written document, the application is rejected. Reports from commercial registries in 2025 indicate an increase in formal notices and removals from the National Business Register for domiciliation at a third party’s place without prior written agreement.
Difference between a post office box and domiciliation at a third party
A simple post office box (like La Poste) does not constitute a valid address for a head office. It remains a mail reception service, without legal value for domiciliation. Only a physical address, whether it is a residence or a commercial premises, can serve as a head office. This distinction eliminates the post office box as an alternative to domiciliation at a friend’s place for entrepreneurs.
Privacy protection: the August 2025 decree on address obscuration
Decree No. 2025-840 of August 22, 2025, created an alternative for leaders concerned about protecting their personal address. Since that date, any leader registered with the RCS can request the obscuration of their personal address. The processing time is set at five working days, and the procedure is free when combined with another RCS formality.
This option reduces one of the common reasons for domiciliation at a friend’s place: to prevent their personal address from appearing on public records. Obscuration at the RCS protects privacy without requiring third-party domiciliation.
Documents to gather for domiciliation at a friend’s place
Whether the domiciliation is personal or professional, the list of documents to prepare remains similar:
- Hosting certificate written and signed by the friend, with date and complete address.
- Copy of the host’s ID.
- Proof of residence of the host (utility bill, tax notice, or recent rent receipt).
- For a business: written verification that neither the lease nor the co-ownership regulations prohibit professional domiciliation.
Personal domiciliation at a friend’s place has no maximum legal duration. It can last as long as the host maintains their agreement. For a business, the situation depends on the type of structure and any contractual clauses in the lease or co-ownership regulations. The key point to remember is that all domiciliation is based on an agreement that can be revoked at any time by the host, which necessitates always having a fallback solution.