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.The form linked below is permission to travel. Download and fill it out. If the child is traveling with only one of their custodial parents, they must have a letter of consent, preferably in English and notarized. Need a notarized minor travel consent form in NYC? Learn why you need one, how it makes traveling easier, and how to get it notarized. A child travel consent form is strongly recommended if a child travels alone, with only one parent or an authorized adult. ☐ - I authorize my child to travel alone. ☐ - I authorize my child to travel with the following individual or organization: •.