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 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. When should this form be used? The intention of this letter is to provide consent for a minor child to travel without the company of both legal parents. Ensure smooth travels with our child travel consent form notary service. Immunization Services. Immunization Record Requests.