[FinnKuhn]

The German Passport has field for your Residence, which is mandatory and needs to be updated when you move. It is generally the general location you live in, usually your city.

You can see the field in this official example passport (field 11): https://www.gesetze-im-internet.de/normengrafiken/bgbl1_2017...

[ChuffedToBits]

Ah, you're right. I guess I never looked at page 2. Never updated it either.

[FinnKuhn]

Technically you would need to do that I think (it is free at your local Bürgeramt). I just did it together with the registration.