Laws governing border crossing procedures constantly change and differ from country to country. You are advised to research and abide by all laws mandated by the country from which you are traveling from and returning to.
This information is copied from US Government website pages and is subject to change. Please use the link below to be sure this information is current.
Currently effective: All U.S. citizens must show proof of identity and proof of U.S. citizenship when entering the United States from Canada, Mexico, Bermuda and the countries of the Caribbean by land or sea. Acceptable documents include: U.S. Passport Book, U.S. Passport Card, or other document approved by the Department of Homeland Security**. U.S. citizens who do not have a single document verifying identity and citizenship must present both an identification and citizenship document; for example, a driver’s license and a copy of a birth certificate or naturalization certificate.
Effective June 1, 2009: The U.S. government will implement the full requirements of the land and sea phase of WHTI. The proposed rules require most U.S. citizens entering the United States at sea or land ports of entry to have a passport, passport card, or other travel document approved by the Department of Homeland Security**.
* Click here for Western Hemisphere Travel Initiative - US GOVERNMENT PAGES
** Department of Homeland Security - U.S. Passport and WHTI Compliant Documents:
U.S. Passport: U.S. citizens may present a valid U.S. passport to enter or re-enter the United States when traveling via air, land or sea from Canada, Mexico, the Caribbean region, and Bermuda.
The U.S. Passport Card: The passport card is only valid for re-entry into the United States at land border crossings and sea ports-of-entry from Canada, Mexico, the Caribbean region, and Bermuda.
WHTI-Compliant Travel Documents for U.S. citizen travel via land or sea, as of January 31, 2008:
IWHC recommends you obtain Mexico car insurance if driving in to Mexico.
Entering Mexico (in Spanish or English only): http://www.inami.gob.mx/EN/index.php?page/I_want_to_travel_to_Mexico_as_Tourist
Link to Current Info Concerning Travel in to Mexico (in Spanish or English only): www.sectur.gob.mx/wb/secturing/sect_eng_manual_of_tourist_entry (pdf)
US Info Concerning Travel in to Mexico : travel.state.gov/travel/cis_pa_tw/cis/cis_970.html