âť– Provide specific information for mode of travel. Out of country travel.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. Find out if you're eligible 2. A notarized letter of consent is a crucial requirement when traveling with minors without both parents or guardians. Fill out a Form DS-71 in the presence of a passport agent. For Minors Under the Age of 16. A child travel consent form allows a minor to travel alone or with another person or group. To get started, you'll need to fill out Form DS11, the official application form for a U.S. passport.