It's not so hard to convince me.

Do you think Kroymann bought RK and made this pic just to gain money from the researchers?
You use the words "nearly all of the other KC-winners". Why "nearly" and not "all"?
I wonder who made this fake document...
I'm not a great researcher and don't have an access to the archives. But "Bundesarchiv" sounds great, so I think I can beleive this. Actually I never disbelieve.

But thanks for your answer!
The conclusion: he was never received his RK and must be removed from RKTs on FSJ websites (I have no Kroymann in my RKT list). Is that so? Or there is a couple of percent that he was RKT?
Regards
redline