See what documents a child needs to travel to or from the US alone or with a parent or relative. Non-US citizen children traveling to the US.Where a minor child is travelling with only one parent, a notarized letter of permit from the parent not travelling may be requested. Log in online to "My Disney Cruise" and then "My Online CheckIn" and you'll find the form that he needs to sign and have notarized. If travelling with non-parents, a notarised letter from the minor's guardians would be required. These are the official forms for use in Family Court proceedings. The intention of this letter is to provide consent for a minor child to travel without the company of both legal parents. There is a special form to fill out when applying for a passport and one parent is AWOL. I am a single parent traveling with my son to Atlantis in August. You will visit the embassy at least twice during the immigrant visa process.