For entry into Mexico and readmission into your home country, you must provide proof of citizenship; generally a passport is required. A passport is recommended for citizens of the U.S. and Canada, but according to the U.S. State Department, a birth certificate with a raised seal, an original Certificate of Citizenship, or a Naturalization Certificate along with a photo ID are acceptable forms of documentation. Minors need a notarized consent from both parents if traveling alone.

A tourist card will be given to you on your flight, which you will fill out and present when passing through Mexican Customs. Arriving by air or sea, you can take up to $300USD worth of goods, duty free, into Mexico. By land, the limit is $50.

For re-entry to the U.S., each person can bring a limited value of Mexican goods into the country, duty free, and up to one liter of alcohol. Confirm the exact dollar value ahead of time with your airline.