When exporting goods to a non-EU country (third country), you must attach accompanying customs documents. These depend in particular on the regulations in the destination country, the value of the goods or the contents of the shipment.
This rule also applies to shipments to EU exemption areas. EU exemption areas are:
Denmark: Faroe Islands, Greenland
Germany: Büsingen, Helgoland
Finland: Åland Islands
France: Overseas Departments
Greece: Mount Athos
Italy: Campione d\'Italia, Livigno, part of Lake Lugano
Netherlands: Overseas territories
Spain: Ceuta, Melilla, Canary Islands
Great Britain: Isle of Man, overseas territories, Gibraltar, Channel Islands
Cyprus: the Turkish part belongs geographically to Europe, but is not part of the