Scratch off tickets is an undersized voucher or cards typically prepared up from paper or card board, where one or more areas contain concealed information: they are covered by scratch off stickers that cannot be seen through, but can be scratched off. The original scratch off tickets was fashioned using hand operated methods or procedures. In 1974 the American company Scientific Games Corporation led by scientist John Koza and retail promotions specialist Daniel Bower produced the first computer generated instant lottery game .In 1987, Astro-Med, Inc. of West Warwick, Rhode Island, received the U.S. Patent for the instant scratch- off lottery ticket.
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