1. Change of address in Switzerland
Although the Permanent Mission of Switzerland in Geneva directly informs the services concerned via a monthly list, the Swiss authorities recommend that members of the personnel inform the relevant service below of their arrival in Switzerland and any change of address within 14 days:

a) for people living in the Canton of Geneva, the Office cantonal de la population et des migrations (OCPM) should be informed (see here and here);

b) for people living in the Canton of Vaud, the Contrôle de l’habitant for the commune in which they live should be informed.

2. Swiss "Attestation de départ"
An attestation de départ (departure certificate) is an essential document for certain formalities that arise upon departure from Switzerland (customs, insurance companies, etc.). It is valid for two months and can be issued one month prior to departure at the earliest.

a) Procedure to follow for people living in the Canton of Geneva: 

• you are strongly advised to apply by post by sending the form “Annonce de départ”, enclosing a photocopy of your carte de légitimation (Swiss card) issued by the Federal Department of Foreign Affairs, to

Office cantonal de la population et des migrations,
Case postale 2652,
1211 Genève 2
(see here), or

• you can also go in person, bringing your carte de légitimation (Swiss card) issued by the Federal Department of Foreign Affairs to

OCPM,
Route de Chancy 88,
1213 Onex
(open Monday, Tuesday, Thursday and Friday from 7.30 a.m. to 1.30 p.m. non-stop, and Wednesday from 9.00 a.m. to 4.30 p.m., tel. 022 546 47 95);

b) Procedure to follow for people living in the Canton of Vaud: go in person to the Contrôle de l’habitant for the commune where you live, bringing your carte de légitimation (Swiss card) issued by the Federal Department of Foreign Affairs.

Relations with the Host-States Service
www.cern.ch/relations
relations.secretariat@cern.ch
Tel. : 72848 / 75152