The German ISSN Centre is hosted by the Deutsche Nationalbibliothek. So far ISSN have only been assigned by the ISSN German Centre upon requests from publishers. From December 2016 on, requests from publishers will still be processed. Furthermore, library staff employed at the DNB section for Acquisition and Cataloguing will assign ISSN to serials entering national collections via legal deposit. These serials will be recorded by DNB staff in the Zeitschriftsdatenbank, the union catalogue for serials holdings supported by 4000 libraries across Austria, Germany and Switzerland. Serial records with ISSN will subsequently be retrieved and processed by ISSN Germany before they are provided to the ISSN International Centre via OAI-PMH. This challenging project is led by ISSN Germany in close cooperation with the ISSN International Centre.