Sample Registration Form (Berlin)
In Berlin, both the new registration and re-registration (move to a new address) use the same form. That’s why it has “previous apartment” column.
The Question, “Die neue Wohnung ist: alleinige Wohnung, Hauptwohnung, Nebenwohnung” is asking if people have more than one apartment in Germany, then need to identify which one is the main or secondary apartment. For most of us, it’s “alleinige Wohnung”, one apartment.
Tips from others:
Registration Form: Leave the box for "Religion" blank, unless you want to pay the church tax (8%~9% of income tax).
Make sure to put your name on your mailbox once you’ve registered, otherwise, your posts may not be successfully delivered to you. (e.g., Letter of Tax ID number, Letter of Broadcast Tax).