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 is strongly recommended if a child travels alone, with only one parent or an authorized adult. A notarized letter of consent is a crucial requirement when traveling with minors without both parents or guardians. A clear statement that grants permission for the child to travel with you. Signatures from both parents, and a notary public if needed. If only one parent is traveling with the child fill out subsection iii. Enter the traveling parent's name, passport number, country of issue and date issued. We will be sharing some family travel tips about what documentation is needed, such as a travel consent letter, for international travel with a minor. 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.