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 is strongly recommended if a child travels alone, with only one parent or an authorized adult. Your child will need a Child Travel Consent any time they're traveling without all their parents or legal guardians present. 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. It's required when a child is traveling alone, with just one parent, or with someone who isn't their guardian, whether domestically or internationally. How to fill out the Child Travel Consent Form Instructions and Guide? A parent or guardian must complete this form and have it notarized no earlier than 30 days prior to departure. One or both parents who are married or in a common-law relationship and live together with the child. Both parents usually have custody rights over the child.