Berlin go go go

Just bought the return ticket from Berlin this morning wahaha...
2 ways ticket only 49 euro per person ^^
Yesterday night suddenly decide and went buy but I think I left 1 of the ticket at there  >~<
because today I notice there are total of 3 cards you will get for each ticket you bought. 
Last night I only get first 2 cards!!
1st ---- Approved that your payment
2nd--- Information of your train
3rd--- Timetable Information of the train

Hope it is ok...... :(