A letter from the person with parental responsibility for the child is usually enough to show you've got permission to take them abroad. Planning on taking your kid on a trip, but the other parent can't join?Print and fill out a child travel consent form from our free samples. A child travel consent form allows a minor to travel alone or with another person or group. A Travel Consent Form is a letter of permission for travel is a document where a parent or guardian acknowledges that their minor will be traveling alone. A travel consent form letter is required for each traveling child. Anyone under the age of 18 will need the consent of their parent or legal guardian if they want to travel. By filling out a child travel consent form, you can help ensure that airlines only allow your child to travel on approved trips. In the case of a minor child traveling alone or with a guardian other than parents, a consent form is required. 58. How do you write a letter of consent for a child to travel with one parent UK?