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. The application process for children, under 18 years of age, is provided on the Welcome.Letter in the "MATP Application Packet for Minors. 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. What must I write in a child's travel consent form? Safeguard your child when they travel. Use our Child Travel Consent template to give parental permission to a travelling minor. The intention of this letter is to provide consent for a minor child to travel without the company of both legal parents. , including travel time.