That is ahistorical. Rome, Greece and so on generally required you to file paperwork, pay money and usually join the military if you wanted to be able to move in their borders and have rights.
Even moving to a new tribe in Native peoples in North America required proving a blood relation, having someone vouch for you, or being skilled enough they would accept you in.
Even moving to a new tribe in Native peoples in North America required proving a blood relation, having someone vouch for you, or being skilled enough they would accept you in.