[gatgeagent]

https://en.wikipedia.org/wiki/List_of_national_identity_card... Lots of countries don't even require citizens to own some special id card.

In my case (Austria, EU), when the police is required to check your identity, and if you aren't carrying some allowed form of identification (id card [most people don't have one around here, no one needs it but it costs as much as renewing your passport], passport [who carries their passport around, might even be expired], drivers license [you might not have one]) they have to follow you home or wherever an recognized identity document of yours may be (e.g. some people store them at a safe deposit box at a bank).