Even better when it doesn‘t proof jackshit. Lost my ID and needed a new one so I went to my city with my birth certificate asking for a new one. And they really said that wasn‘t enough and they needed confirmation from the city I got the ID originally from that it was actually me.
Well why did I need to bring it in the first place then? Glad it took them only six months to get me a new ID as well. Fucking german bureaucracy.