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. Use our Child Travel Consent form to prove that a child can travel without their parents or guardians.There is no Canadian legal requirement for children to carry a consent letter. If children are not travelling with both their parents, (ie: if they are travelling alone, or with another adult), this form can be used to give permission. Parental consent documentation for travel to Canada and Mexico. A travel consent is used to when traveling with minor children whether on trips with organizations, family members, or one parent. A minor (child) travel consent form shows that a child has permission to travel without both parents or legal guardians. How do I write a consent letter for my child to travel? You definitely need to get a letter of permission. Preferably notarized.