What must I write in a child's travel consent form? 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.Provide your child's basic information. How do I write a consent letter for my child to travel? A travel consent is used to when traveling with minor children whether on trips with organizations, family members, or one parent. A travel consent is used to when traveling with minor children whether on trips with organizations, family members, or one parent. There is no standardissue minor travel consent form. Writing a child travel consent form is important when a child is traveling with someone other than their legal guardian or parent.