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.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. Completing a travel consent form is easy with Notarize. Keep reading to learn about the notarization process and signer requirements for this document. Minor (Child) Travel Consent Form. A minor (child) travel consent form shows that a child has permission to travel without both parents or legal guardians. A notarized letter of consent is a crucial requirement when traveling with minors without both parents or guardians. A child travel consent form is strongly recommended if a child travels alone, with only one parent or an authorized adult. He's on one flight with one child, and I'm on another flight with the other.