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.The intention of this letter is to provide consent for a minor child to travel without the company of both legal parents. This restriction does not apply to document holders of the United Kingdom or Ireland. Consent form for minors. Passports for applicants age 15 or younger are valid for five years. Ensure smooth travels with our child travel consent form notary service. A consent letter demonstrates that a child has permission to travel outside Canada from every parent or guardian who is not accompanying them on the trip. A child travel consent form allows a minor to travel alone or with another person or group.