What happens if I go to Mexico without a US passport?
What Happens When You Go To Mexico Without A Passport? If you try to enter Mexico without a valid travel document (i.e., your passport), authorities may deny you entry into the country. This is true for all forms of travel.
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At a Glance: Yes, you need a passport to go to Cancun, Mexico from the United States. When traveling by air, a valid passport is required, along with a completed Multiple Migratory Form (FMM).
All citizens of the United States must present a valid passport when entering Mexican territory by any means of transportation. There are no exceptions for minors.
All U.S. citizens need U.S. passport books if re-entering by air. Land and sea border crossings accept additional travel documents, such as U.S. Passport cards and Trusted Traveler cards. Child travelers have additional options - see the Traveling with Children section.
To clarify, U.S. citizens entering Mexico must present proof of citizenship (such as a certified copy of a birth certificate), photo ID and proof of sufficient funds. A passport and visa are not required of U.S. citizens entering Mexico for tourism or for transit for stays of up to 90 days.
Generally, it is necessary to have a valid passport if you want to travel abroad. Depending on the country and your citizenship, you may also need to show proof of a valid eVisa, online visa, or visa.
In most cases, U.S. citizens don't need a passport to book an international flight. However, you do need one to check in for your flight and get on a plane, and the document has to be valid. For instance, European countries that are in the Schengen area require at least six months of passport validity.
If your passport's time is almost up, don't wait — start the renewal process now. You can't travel while your renewal application is being processed, and you need to make sure your travel documents are valid for at least six months past the dates of any planned international trips.
As early as January 1, 2008, U.S. citizens traveling between the U.S. and Canada, Mexico, Central and South America, the Caribbean, and Bermuda by land or sea (including ferries), may be required to present a valid U.S. passport or other documents as determined by the Department of Homeland Security.
U.S. nationals, including U.S. dual nationals, must use a U.S. passport to enter and leave the United States. U.S. dual nationals may also be required by the country of their foreign nationality to use that country's passport to enter and leave that country.
There are no penalties. The customs officials might be furious but the only thing they can do is confirm you're citizen and let you back in. As for leaving the US, the US doesn't have exit checkpoints so you can leave on any passport.
Mexico requires that young adults show photo identification, either a passport or driver's license, as proof of age when buying alcohol. Be prepared to have your ID at most resorts, bars, restaurants, and nightclubs, even though most are not strict in their practice of checking.