Extended certificates confirm that an email address can be assigned to a natural, identifiable person. In this case, the University of Rostock is bound to verify the certificate data using an official photo ID. For this purpose, an identity check at the ITMZ is necessary, during which one of the following official documents must be presented:

• Identity Card
• Passport
• German Residence Permit
• European Driver's License

After the identity verification, you can issue extended certificates for yourself according to your personal needs.
For an identity check, please contact the ITMZ staff by phone to schedule an appointment:

• +49 381 498 5328   Martin Sievers-Luboschik
• +49 381 498 5327   Martin Röhlig
• +49 381 498 5320   Jörg Zerbe
• +49 381 498 5339   Jörg Maletzky

Extended certificates contain not only the email address but also the name of the associated natural person. When these certificates are used for signing PDF documents, the name of the signer is displayed accordingly.

However: The certificate chain for extended certificates is not stored in Acrobat. This usually results in the error message that the signature appears valid, but the certificate chain is not trusted or cannot be verified. Costly specialized document-signing certificates are not offered by the University of Rostock's certificate service.