All U.S. citizens must have a valid passport to enter and exit Guatemala. Driver's licenses, birth certificates and photocopies are not accepted by the Guatemalan government.
There is an exit tax that must be paid when someone leaves Guatemala by air.
Minors entering and leaving Guatemala do not need permission from parents.
Visas are needed for Americans staying in Guatemala for more than 90 days.
In June 2006, the "Central America-4 (CA-4) Border Control Agreement" was passed. This means that any citizens of El Salvador, Honduras, Nicaragua and Guatemala can travel freely between those nations.
