
Scratchcard
Card with hidden text revealed by scratching

Card with hidden text revealed by scratching
A scratchcard is a card designed for competitions, often made of thin cardstock or plastic, where one or more areas contain concealed information which can be revealed by scratching off an opaque covering. Applications include cards sold for gambling (especially, lottery games and quizzes), free-of-charge cards for quizzes, fraudulent free cards encouraging calls to premium rate phone services, and to conceal confidential information such as PINs for telephone calling cards (otherwise known as recharge cards) and other prepaid services. In some cases, the entire scratchable area needs to be scratched to see whether a prize has been won—the card is printed either to be a winner or not—or to reveal the secret code; the result does not depend upon what portions are scratched off. In other cases, some but not all areas have to be scratched; this may apply in a quiz, where the area corresponding to the right answer is scratched, or in some gambling applications where, depending on which areas...
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