Travelers to Mexico from the United States must present a U.S. passport that is valid for at least six months with one blank page for entry stamp. Passports may not be accepted if they are damaged, mutilated or washed. Tourists must also present travel visas to Mexican immigration before entering the country.
Tourist visas or entry permits, known as Forma Migratoria Multiple, are also required and may be obtained either at land border crossings or upon arrival at the airport. Travelers who fail to present the proper documents may be detained by immigration officials and denied boarding passes for airline flights. Mexican immigration officials will alternately accept a U.S. passport card from visitors who travel by air. However, U.S. immigration requires a valid U.S. passport to return from Mexico to the United States.
Travelers may apply for a passport through any passport agency or passport application acceptance facility, by submitting a DS-11 application for a U.S. Passport. Applicants must prove citizenship by submitting a U.S. birth certificate, naturalization certificate or certificate of citizenship. All documents must be certified; notarized copies and photocopies are not acceptable. Also, applicants need a government-issued photo ID and passport photo to complete the passport application.