As a member of the Association of German information and media directory e. V. (VDAV) we comply with the VDAV quality label. Among the members of the VDAV include more than 160 German publishers and providers of information media, who bring out about 2000 various publications.

Since 1949, the german institute IVW has been calculating and neutrally and objectively checking the distribution of advertisers. As an independent, non-commercial and neutral testing institute, IVW supports the media and advertising industry, and interested public, with fundamental data for the marketing of media as advertising.