If you’re staying in a private residence you should go to the nearest police station within 24h
of arrival to register yourself. You should always be accompanied by the owner of the
residence so they can verify you are staying in his or her house.
If you don’t go to the police station, you could get a fine the next time you present any official paperwork. This card is also needed in order to apply for a VISA, so make sure to keep it in a safe place.
Example of the residence application form (white card) -
List of every police station where you can submit the application in Belgrade