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.Use our Child Travel Consent form to prove that a child can travel without their parents or guardians. We will be sharing some family travel tips about what documentation is needed, such as a travel consent letter, for international travel with a minor. It is very simple to do. A Child Travel Consent Form is required where a minor child under the age of 18 is traveling internationally without both parents present. A clear statement that grants permission for the child to travel with you. Signatures from both parents, and a notary public if needed.