When using U.S. preclearance facilities at a Canadian airport, you must meet U.S. entry requirements. What travel document do you plan to use to travel to Canada?Passport Alien's passport for stateless persons. We provide services to Canadians visiting and living in the United States. Consult the Citizenship and Immigration Canada website to determine if you need a Canadian visa stamp to enter Canada, and for instructions on how to apply. Air Canada applies travel document requirements contained in IATA's Travel Information Manual, available on the IATA Travel Centre website. Approval of this form is required in advance of travel, except in extraordinary circumstances. Find out what document you need to travel, visit family and friends, do business, or transit through Canada, and how to extend your stay.