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. A child travel consent form is strongly recommended if a child travels alone, with only one parent or an authorized adult. While it's recommended to have notarised written consent, it's definitely not required and in my experience you're highly unlikely to be asked for it. Most people who travel regularly with just one parent do have this consent form. I was asked to present the consent form at immigration when I was returning home from the Bahamas with my grandparents. I was 15 at the time. The intention of this letter is to provide consent for a minor child to travel without the company of both legal parents. It's required when a child is traveling alone, with just one parent, or with someone who isn't their guardian, whether domestically or internationally.