Any questions or suggestions?

Do you have suggestions or questions about our offers and services? Please contact us - we will be glad to help you!

The library's central phone number can be called during service hours from Monday to Friday from 9 a.m. to 5 p.m. on +49 (0) 40 42827-5675.

The phone numbers of the individual contact persons and their personal email adress can be found on the page Team. Via the function email addresses we ensure that your request will be processed even if the responsible person is absent.



Topic Contact us via...
General questions, feedback
Reserve material
Research help, introductions recherche(at)
Reference management
Open Science, Current research information system (CRIS)
HCU theses
Ebooks & ejournals
Proposal of purchase
Reference collections for staff
Interlibrary loan fernleihe(at)
Current Research Information System, Research Data Management fis(at)



In addition to telephone and email, we offer you the option to chat with us. This is available Monday to Friday from 10 am to 4 pm. You can find the chat symbol in our literature search engine at the bottom right.

With this information service we support you with

  • Literature research on your topic
  • Questions about databases
  • Problems accessing digital media
  • Questions about your library account
  • and much more

Legal and medical information is not given.

Should we not be able to answer a question quickly, we will take it with us to our team and contact you within a maximum of 24 hours with an answer.

The chat service is primarily aimed at HCU members and users of the library. Your data will be treated confidentially. Only the chat history for internal evaluation and your contact details are saved if you send them to us. We need this data for later contact of we were not able to answer your question immediately. They will be deleted after 30 days.