We make every effort to design the DBFZ website in such a way that you as a user can find the information you are looking for quickly and efficiently. Nevertheless, we are dependent on your information for the further improvement of this page. Did you find an error or did you encounter a technical problem? We kindly ask you to give us feedback if you have any problems using the various functions of this website. Please describe your problem in as much detail as possible so that we can help you quickly. Of course we are also happy to receive praise.