A Visa is not required for Travel up to 90 days however the Embassy requires the following documents to be sent to the Embassy before travel.
Photocopy of Valid U.S. Passport 2 Photographs 2 Completed Visa Applications Letter from U.S. Company (must have a financial guarantee of minimum $2000.00 in the body of the letter) Copy of Tickets/Flight Itinerary Cover Sheet
Consular Fee: No fee for U.S. Passport holders
Service charge: $45.00-$90.00
Washington Postage:15.00