All visitors arriving in Micronesia must have a passport. The document must be valid for at least 120 days beyond the date of entry into Micronesia.
Citizens and nationals of Micronesia, Palau, Marshall Islands, or United States may prove citizenship or nationality by possessing a passport, birth certificate or FSM entry permit. They can stay for up to 365 days.
Everyone else can get up to 60 days on arrival.
Entry Requirements - Federated States of Micronesia