Find out if you're eligible 2. Know what documents a child needs to travel to or from the U.S. All children, including infants, must have their own travel documents.❖ Provide specific information for mode of travel. Out of country travel. One form is an authorization to travel with the child. The most common interpretation is that the traveling parent requires a notarized letter something not found in any custody order. By law, both parents must agree to a child's travels. Before going through security control, you'll have to complete a consent form. Download consent form (English only). The DS3053 form is for situations where only one parent or guardian is able to fill out the paperwork.