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.The intention of this letter is to provide consent for a minor child to travel without the company of both legal parents. 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 allows a minor to travel alone or with another person or group. No, it is not legal for one parent to leave the US with a minor child without the consent of the other parent. Your child needs a Child Travel Consent when they're traveling without all their parents or legal guardians. 201 Caroline St. Suite 170 (First Floor) Houston, Texas 77002. Or alternatively, the presence of a single parent who can provide documented evidence of sole custody.