NewsOfficial newsTopic: At CERN Voir en fran?ais Arrival/change of address in Switzerland and Swiss “Attestation de départ” . 25 March, 2024 The Swiss authorities strongly recommend that members of the personnel declare their arrival in Switzerland and any change of address within 14 days, particularly if they have children of school age. In addition, certain formalities linked to leaving Switzerland (e.g. lease termination, customs declaration, ...