Today a DBA contacted me and mentioned that he could not use this title in Germany.

This article settles the dispute.

http://www.sueddeutsche.de/karriere/ersehnte-entscheidung-dba-und-doktor-gleichwertig-1.3018469

If you have successfully passed your Doctorate of Business Administration you should not allow a person to even doubt you achievement especially if you have studied at one of the globally accredited Business Schools.

If you are looking into an Executive MBA or a DBA from one of the top Business Schools feel free to contact
me or connect on LinkedIn https://www.linkedin.com/
Werner Krings