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.A travel consent is used to when traveling with minor children whether on trips with organizations, family members, or one parent. A child travel consent form allows a minor to travel alone or with another person or group. When a kid goes on a trip without a parent or legal guardian, migration officers can require to show a letter of consent. According to the USA. Gov website, if a child is traveling abroad with one parent, the other parent must supply a notarized letter granting permission.