. >> cory rossen showed us how. when he scans a winning ticket, a special screen pops up, telling him how much the customer won. >> in this case, it is, in fact, a winning ticket of $500. it was a $2 ticket called the ring of cash. wheth when validated it will pay the customer $500. >> it acquires the clerk to push a button, acknowledging it's a winner. >> if it's a winning ticket, it will push through a verification with a prize amount. >> it also has a time stamp and the ticket number printed on it. it even admits a lottery alert. >> winner, winner. >> an onscreen notice that cannot be ignored. a printed receipt and even a cheer. >> winner, winner! >> so it's almost error proof for us as a teller. >> the investigators move down the row. next stop, columbus. >> going to be going into bushman's with winning rings of cash tickets. a $500 winner. >> at this store, called bushman's market, he instruct the investigators to up the ante and take in a $7,500 winning ticket and two losers. >> man, going to be hot again toda