How to write this kind of sentence for a distinguished lecture series?

Question

I work in a Chinese university and recently our department has decided to start a Distinguished Lecture Series in Physics. We want to give the invited speaker some kind of document showing that, basically, he has been a speaker at this series. I'm not sure what's the best way to write this sentence. I'm not even sure what this kind of document should be called. A certificate? Some kind of award? Please give me some clue. Thank you very much.

Answer 1

You could call it a Certificate of Presentation.

It could include this language:

This Certificate of Presentation acknowledges that on ___________ (date) _________________________ (name) participated as a speaker (or lecturer) at the Distinguished Lecture Series in Physics organized by ____________________ (name of university) and held in ____________________ (name of city or location).

Then, it would be signed and dated by someone affiliated with your university.