New Proof of Citizenship Laws Are Now in Effect
As of June 1, 2009, U.S. and Canadian citizens need either a passport or one of several other accepted forms of I.D. (NEXUS card, FAST card or enhanced driver's licence/enhanced identification card) to drive to and from Canada and the U.S.
You can get more information at:
Or you can call for information:
Canadians: 1-800-461-9999 (English), 1-800-959-2036 (French)
United States: 1-877-227-5511