Corrected entry: Dundee explains that he has no idea how old he is as he does not know when he was born, and that his birth was never registered. This would make it impossible for him to obtain a passport, and he could not have travelled to the United States without one.
jimba
29th Dec 2018
Correction: It would make it more difficult, but not impossible. Even the US today has procedures listed on the US State Department website for how people without certified birth certificates can present alternate forms of proof of citizenship to obtain passports. For a country like Australia, with a large backcountry, such procedures must also exist since this situation certainly occurs with a small but not-unheard-of frequency.
jimba