We provide services to Canadians visiting and living in the United States. 1. Get your passport, credit or debit card ready, and read the help document.You must have a valid Canadian passport to take a cruise from the United States. Some of the countries you visit will not permit entry without a passport. If you need a passport urgently contact the Canadian Citizen Services Contact Centre for Canadians in the U.S. at 8448806519. Letter of Authorization. Click the button to complete and print out two copies of the Authorization Letter. Type or print legibly in black ink. Apply online for an eTA. The following information and resources can assist you to manage emergency or crisis situations that may arise while you are abroad.