More frequently, it is caused by communication problems with the server which tracks and assigns ticket serial numbers.
Hand paying allows a floor attendant to collect the patron's identification and tax ID numbers (such as the Social Security number in the United States), and other pertinent information, such as the winning combination.
[3] To perform a hand pay, a floor attendant may complete a form which the patron presents to the cash cage to be paid out.
In other casinos, the floor attendant will retrieve the funds and pay the patron directly.
Most casinos will require an electronic record of the hand pay to be made through the slot accounting system.