Traditional scratch cards are cards made from cardboard or plastic that can be used for gambling or raffles. They are named free scratch cards or online scratch offs because you need to scratch off a portion of the surface to reveal prizes.Usually, you win real money or a prize by finding three matching symbols. The symbols can be anything from pictures to money, as long as there are three of them. Different scratch card games titles have different symbols and themes. You can now play scratch cards online at lotteries and most online casinos in the US.