The Government of Mexico requires that all U.S. citizens present proof of citizenship and photo identification for entry into Mexico. A U.S. passport is recommended, but other U.S. citizenship documents such as a certified copy of a U.S. birth certificate, a Naturalization Certificate, a Consular Report of Birth Abroad, or a Certificate of Citizenship are acceptable.

U.S. citizens boarding flights to Mexico should be prepared to present one of these documents as proof of U.S. citizenship, along with photo identification. Driver's permits, voter registration cards, affidavits and similar documents are not sufficient to prove citizenship for readmission into the United States.

A visa is not required for a tourist/transit stay up to 180 days. Travelers entering Mexico for purposes other than tourism require a visa and must carry a valid U.S. passport.

The Government of Mexico charges an entry fee of $170.00 Pesos per person to U.S. citizens traveling to Mexico's interior -- however, please note that the entry fee is subject to change without notice.

Minors require notarized consent from both parents if traveling alone or in someone else's custody, or from the absent parent if traveling with only one parent.

Mexican regulations limit the value of goods brought into Mexico by U.S. citizens arriving by air or sea to $300 per person and by land to $50 per person. Amounts exceeding the duty-free limit are subject to a 32.8 percent tax.

Upon arrival in Mexico, business travelers must complete a form (Form FM-N 30 days) authorizing the conduct of business, but not employment, for a 30-day period. U.S. citizens planning to work or live in Mexico should apply for the appropriate Mexican visa (Form FM-2 or FM-3) at the Mexican Embassy or nearest Mexican consulate.