Just found your Post in the Official Forums,

I sent you 2500 ZEITcoins to each of your ZEIT Addresses,

Use Coin Control and send back exactly 2000 ZEITcoins to MgUFJ2AJvhaWsW4kkfwoDuzy2pZSQLJB63 , from the 2500 that was sent to you.
(Only send from the block of 2500 sent to you, sending from another block , can cause the entire block amount to be subtracted from your total by the block explorer stats.)

This confirms your ownership of the Account.
Within 24 hours of confirming ownership of the account,
A Post will be added to the ZEIT Forum of your Achievement & ZEIT KNIGHTHOOD!!!

 

FYI:
If you have never used coin control before, read this first:
https://bitcointalk.org/index.php?topic=487814.msg10296134#msg10296134

PM me if you have any questions.