There's no Anmeldung system in America. Actually voter registration is the closest thing you have to an official current address, and it's a lot easier to do (no appointment required).
Yes I know, which is strange, and I know many Americans are proud of it (no snooping state etc.) but overall I think there are more downsides to it. I feel this is an artifact from times without phone lines and computers with many small towns hundreds of miles apart (also see electorial college) and was a necessity but is now kept b/c of identity and tradition.
There's no Anmeldung system in America. Actually voter registration is the closest thing you have to an official current address, and it's a lot easier to do (no appointment required).