DVR Number

The DVR number (DVR-Nummer in German) is a code of seven digits that is given to every controller [Auftraggeber] who notifies his data applications [Datenanwendungen] with the Data Processing Register [Datenverarbeitungsregister]. Not every controller is required to notify, meaning that somebody can legally run a data application and have no DVR number. See the page on notification for more information.

If the data application [Datenanwendung] is subject to notification, communications to the data subject shall carry the controllers registration number (section 25 DSG 2000).

If you know the DVR number or name of a data controller, you can look up his information in the online database of the Data Processing Register (only in German).