Expecting citizens to produce proof of their right to exist at a moment's notice is a famous signifier of a police state. https://en.wikipedia.org/wiki/Your_pap

Expecting citizens to produce proof of their right to exist at a moment's notice is a famous signifier of a police state. https://en.wikipedia.org/wiki/Your_papers,_please https://en.wikipedia.org/wiki/Your_papers,_please If you have a specific reason to suspect and investigate an individual, that's a different matter.