If the parent is deceased a certified death certificate may be necessary. 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. Minor children may be able to travel to another country without either one of their parents. If one parent is traveling with minors they are supposed to have a letter form the other parent granting permission. If travelling with non-parents, a notarised letter from the minor's guardians would be required. If travelling with non-parents, a notarized letter from the minor's guardians would be required. Passports must be valid at time of entry through departure (throughout the duration of stay). BLANK PASSPORT PAGES: Two pages are required for entry stamp. The minor consent form can be found here.