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.Minor children may be able to travel to another country without either one of their parents. A notarized letter of consent is a crucial requirement when traveling with minors without both 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. A notarized letter of consent will be required for children who travel without one or both of their parents or legal guardians. 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. I was preparing documents and someone told me that I might need minor travel consent form since I am not leaving. Passport, visa or consent to travel, Little Guest tells you everything you need to know about the subject to help ensure a calm depart for your children.