Use our Child Travel Consent form to prove that a child can travel without their parents or guardians. A child travel consent form allows a minor to travel alone or with another person or group.A notarized letter of consent is a crucial requirement when traveling with minors without both parents or guardians. 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. I was asked to present the consent form at immigration when I was returning home from the Bahamas with my grandparents. I was 15 at the time. Parental consent is not required for in-state travel. The easiest way to obtain consent is to have it written in to a child custody agreement. One form is an authorization to travel with the child.