Switzerland has concluded free trade agreements with a number of countries. The preferential treatment granted under these agreements applies only to goods which comply with the origin provisions, however.
Preferential tariffs are customs facilities (duty-free or reduced tariff rate). They are granted only to goods which comply with the rules set out in the free trade agreement, i.e. they must in particular demonstrate origin as required by these agreements.
The full content is available in German, French or Italian.
Fact sheet for determining the formal validity of proofs of origin
Free Trade Agreements (overview)
Authorities entitled to issue EUR. 1 / EUR-MED / Certificates of Origin
FAQ (only available in german, french and italian)