FLYGVA,
thank you for your reply. I am not mixing them though. This may indeed be the wrong thread, but registration with the Bundespolizei is a prerequisite for German nationals without a green card to participate in Global Entry. After two years it needs to be renewed. Therefore I decided to ask my question here, instead of a general GE thread, hoping a German who has gone through the process would answer. I live in the US on a visa. My two years are up prior to my next visit to Germany. Therefore I was wondering what happens during that 'grey zone' and immediately after re-registration.