Dal sito del dipartimento di Stato http://travel.state.gov/travel/...
SWITZERLAND - *Passport required (must be valid for at least 3 months after leaving Swiss territory). Visa not required for tourism/study stay of less than 90 days. Visa not required for business/medical stay of up to 90 days. Stays exceeding 3 months require a visa and residence permit. Visa requires a valid passport, 1 passport photo, proof of residency, onward/return ticket, proof of sufficient funds, and a letter from employer including your position and salary. For further information, contact the Embassy of Switzerland, 2900 Cathedral Ave., NW, Washington, DC 20008 (202/745-7900) or the nearest Consulate General: CA (310/575-1145 or 415/788-2272), GA (404/870-2000), IL (312/915-0061), NY (212/599-5700), or TX (713/650-0000).Internet: www.swissemb.org