Swiss documents are naturally valid throughout Switzerland. However, these documents are not automatically recognized by other countries.
To overcome this problem, we can add an apostille on your documents, according to the "La Haye Convention" of October 5th 1961, so they can be recognized abroad.
This is often the case for example for extracts from the commercial register, to prove the the company's identity in another country than Switzerland.
La Haye Convention (1961)
Apostille Convention (Wikipedia)