What is the civil registration office and why do I need to register there? (Austria)
By law, every citizen must register at his or her place of residence.
This must be done within 3 days of the actual move-in date (not after finalizing the rental contract).
A domicile can be registered in any civil registration office, regardless of the district in which you reside. Your house manager will provide you with the registration form/lessor’s confirmation after you move in.