A minor travel consent form is needed when a child is traveling without one or both of their legal 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. A child travel consent form allows a minor to travel alone or with another person or group. What documents are needed for a US citizen minor child traveling with her grandparents and Aunt? This form is often required when a minor child will be traveling to another state or country without both parents being present.