1. Get your passport, credit or debit card ready, and read the help document. A consent letter demonstrates that a child has permission to travel outside Canada from every parent or guardian who is not accompanying them on the trip.Registration of Canadians Abroad is a free service that allows the Government of Canada to notify you in case of an emergency at your destination. Fill out the International Travel Authorization Forms and waivers. You preclear US immigration and customs at Vancouver,and when you walk off at Salt Lake City it is just like leaving a domestic flight. You will need your passport when completing the application. Book with cash. arrow_drop_down. Round-trip. arrow_drop_down. To complete the interview via EoA, you must be in possession of the following documents: A valid passport. Official websites use .gov. Free Visitors Guides.