Aurora Kephart, who works at the Conway's Restaurant and Lounge in Springfield, Illinois, was on a closing shift last week when one of her costumers gave her a tip in the form of an unplayed Keno ticket.
As Kephart ran the ticket, it won a prize of USD 17,500, 'kezi.Com' reported.
Kephart immediately tried to give it back to the generous customer but he did not accept it, saying it belonged to her.
The customer even bought a round of drinks for everyone in the bar to celebrate her win, said Kephart.
Owner of the restaurant, George Conway, said Kephart, an employee for four years there, was very deserving of such a tip.
Even after the big win, Kephart still came back to work the next day for another closing shift, the report said.