tickets reserved but how do i pay them

i have reserved tickets for the leipzeg match and have a print out for the tickets..it says i have to pay by bill but not sure how this works ie when do i receive the bill

the bill must be in the pdf of the tickets. then you have to transfer the money from you bank account.

the account number of eintracht must be on the bill, and the "auftragnummer" is important, that they can see that you pay the bill. you have to fill the "auftragsnumer" in the "usage" of the transfer.

then send it, it must be paid