If travelling with non-parents, a notarized letter from the minor's guardians would be required. Since there aren't any official child travel consent forms, you'll have to make up your own.It must be a notarised authorisation. If travelling with non-parents, a notarised letter from the minor's guardians would be required. 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 one parent is traveling with minors they are supposed to have a letter form the other parent granting permission. At what age can children travel unaccompanied to The Bahamas and what documentation should they have to gain entry? The form linked below is permission to travel. Download and fill it out.