Dernière mise à jour : 2026-02

Permits & Registration at CERN

Overview

As staff of an international organisation, CERN employees have a special permit status. You do not need a standard Swiss or French work permit to work at CERN.

Your legal status is managed through CERN and the host state agreements with Switzerland and France. The CERN Users Office is your main point of contact for all permit and registration matters.

Swiss Carte de Légitimation

The Carte de Légitimation is an identity document issued by the DFAE (Swiss Federal Department of Foreign Affairs) that certifies your status as a member of an international organisation. The type of card you receive depends on your nationality and contract. Common types include B and C (with full customs privileges), D and E (limited customs privileges), P (scientific personnel), and S (Swiss nationals), while types H, F, and G carry no special customs privileges.

The card is obtained through the CERN Users Office, which processes the application with the DFAE on your behalf. You must register within 14 days of your arrival to initiate this process. The card's validity is linked to the duration of your CERN contract and must be renewed if your contract is extended. Among its key benefits, the carte de légitimation exempts you from standard Swiss work and residence permits and provides certain tax and customs advantages.

French Titre de Séjour

If you live in France -- for example, in the Pays de Gex -- you need a titre de séjour (residence permit) in addition to your CERN carte de légitimation. International organisation employees are granted a special titre de séjour category, which is different from standard work permits. You apply for it at the prefecture of Ain (Bourg-en-Bresse) or the sub-prefecture corresponding to your place of residence.

The application requires several documents, including your passport, proof of address, CERN contract, carte de légitimation, passport photos, and a completed application form. Keep in mind that the titre de séjour must be renewed before its expiry date, so it is wise to start the renewal process well in advance -- at least two months before expiry.

The 14-Day Rule

You are required to register with the CERN Users Office within 14 days of your arrival. This is a strict obligation and should not be delayed. Registration triggers the carte de légitimation application process and formally establishes your legal status in Switzerland. Registering late can delay your carte de légitimation, affect your health insurance coverage, and lead to other administrative complications.

Family Members

Your spouse or partner and children can receive their own legitimation cards as dependents of the primary holder. Your spouse or registered partner must be declared to the Users Office; common-law partners may face different requirements depending on nationality. Minor children are included in your registration automatically, though adult children may require additional paperwork.

To register family members, you will typically need to provide a marriage certificate, your children's birth certificates, sworn translations into English or French if the documents are in another language, and a Hague apostille if applicable. It is best to gather all these documents before arriving at CERN.

Changing Residence

If you move from Switzerland to France, you must notify the CERN Users Office, apply for a French titre de séjour, and update your address. Moving in the other direction -- from France to Switzerland -- requires registering with the relevant Swiss commune and notifying the Users Office as well.

Any change of country of residence requires new permits, and the process can take several weeks, so plan ahead. You should notify the Users Office as soon as possible, ideally before the move. Deadline requirements vary by country.

Practical Tips

Start your paperwork immediately upon arrival -- do not wait. Keep copies of all documents, both physical and digital, as you will need them on multiple occasions. The CERN Users Office is your main point of contact for any permit and registration questions.

Have passport photos ready in Swiss format (35x45 mm) for cards and permits. If you have family members joining you, gather all necessary documents -- certificates, translations, and apostilles -- before arriving at CERN to avoid delays.

Sources & Links

• CERN Users Office
• DFAE - Swiss Federal Department of Foreign Affairs
• Prefecture of Ain - Residence Permits
• CERN Admin e-Guide

Révision et maintenance

Maintenu par Efrén Rodríguez Rodríguez. Revue trimestrielle des contenus et des liens officiels.

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Note : ce contenu est informatif et ne constitue pas un conseil juridique ou fiscal professionnel.