- Transit Without Visa with a confirmed onward ticket for a flight to a third country within 48 hours. Must stay in the international transit area of the airport and have documents required for the next destination.
State Dept. reports: "U.S. citizens of Tunisian origin and dual American-Tunisian citizens are expected to enter and exit Tunisia on their Tunisian passports. If a Tunisian-American succeeds in entering using a U.S. passport, he or she will still have to present a valid Tunisian passport to exit the country. If a U.S. citizen enters Tunisia on a Tunisian passport, he or she must exit on a Tunisian passport."
U.S. policy on dual nationality can be found
State Dept. reports: "A residence permit is needed for stays longer than 90 days. The residence permit can be obtained from the central police station of the district of residence."
State Dept. reports: "U.S. citizens born in the Middle East or with Arabic names have experienced delays in clearing immigration upon arrival."