Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
Explanation: assuming this certificate is awarded on the basis of a satisfactory seminar paper. (Referat) If this is not the case then instead of saying 'Awarded for", you can say "with satisfactory completion of the seminar paper " (referat)