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.You will need your passport when completing the application. Applying for an electronic travel authorization (ETA) tell us about yourself. First name(s) (also known as given name) (required) To complete the interview via EoA, you must be in possession of the following documents: A valid passport. This is to request a travel endorsement on your I-20 or DS-2019. Related Forms and Guides: International Travel. You will need your passport when completing the application. We provide services to Canadians visiting and living in the United States.