What must I write in a child's travel consent form? 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. 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. The most common interpretation is that the traveling parent requires a notarized letter something not found in any custody order. Ensure safe travels for your child with our free travel consent form template and expert guide. Get consent from both parents and travel with confidence. Typically, your Custody Order will include specific language that addresses when and how travel is permitted with your children. Children traveling alone can't check in online or at the kiosk.