If children are not travelling with both their parents, (ie: if they are travelling alone, or with another adult), this form can be used to give permission. 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. A travel consent form letter is required for each traveling child. Child's Information: The form includes the child's full name, date of birth, place of birth, and passport or identification details. I will be travelling internationally with our daughter. My wife is not joining us this trip. How do I write a consent letter for my child to travel? Does anyone know where I can find a form to authorize travel for my grandson cruising with me, and not with his parents? 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.