After finishing printing, like in the creation of game data, security of the game data and a deleting and restore-preventing job of the game data still existing in printing facilities must be confirmed.

Large vendors automatically confirms and removes remove tickets from a moving rail by reading each barcode by means of a scanner in a Balanced Prize Structure stage as in [Fig10. Quality control of ticket printing]. Sometimes, there is separately categorizes the removed tickets in a Secure Lock box. However, since the number of printing companies removing remove tickets manually is much more than the number of ticket printing companies having such an automatic facility, the accurate remove of remove tickets must be confirmed.

Since remove tickets include additionally printed high prize tickets, the remove tickets must be prevented from illegal distribution and selling by thoroughly confirming the discard of the remove tickets.