>>32
As far as I know, people born in the Overseas Territories have a right to French citizenship, but they aren't born with it and must claim it when they are eighteen years old with proof that they speak French. As opposed to people born in Overseas Departments who are French simply by being born there and require no legal confirmation of any kind.
For administrative procedures requiring a mailing address, it is widely understood that beyond the unified postal cost area, the administrative entities do not assume the responsibility.
For one, when you send something to Mayotte, you do not write France in the bottom line, you write Mayotte. Contrast this with Alaska or Hawaiʻi.