Before a lack of documents = proof of illegal activity , consider these alternatives
imagine asking your dictator for permission to leave
identity documents may be the reason you could face execution
certain countries refuse to register children born in their territories or territory they control (occupy) if the child is of a different ethnicity / religion , usually a minority
(example Indian controlled Kasmir )
Why refugees lack proof of identity
https://crvssystems.ca/blog/refugees...e%20to%20crime