Minors 16 and 17 years of age need only one parent present. A child travel consent form is strongly recommended if a child travels alone, with only one parent or an authorized adult.You can ask the judge to order that only one parent can consent to the child getting a passport. 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 child travel consent form legally grants a minor aged under 18 permission to travel without their parent(s) or legal guardian(s). A travel consent is used to when traveling with minor children whether on trips with organizations, family members, or one parent. The default rule is typically for both parents to consent to the child's trip abroad. A parent can sign an "authorization agreement" form to give a nonparent the authority to care for and make decisions for a child. A Child Travel Consent is required to cover all bases and legally allow a minor to travel with one of the parents or with a third party.