The dealer built a radio transmitter inside of a pack of cigarettes and a roulette ball with a small receiver inside. In 1973, a French roulette dealer at the Casino Deauville, along with his sister and brother-in-law, took the casino for 5 million francs (about $1 million). French authorities found the marked cards and noticed the cheaters' contact lenses after they ruled out cameras and infrared glasses. Les Princes Casino grew suspicious of the players when they returned later in the week for a second round of high stakes poker. One of the cheaters (an employee of the casino) used invisible ink to mark the backs of playing cards-drawing a line for an ace and a cross for a king, for example-while the others used special contact lenses to spot the cards that would give them winning hands.

Special Contact Lensesįour con artists ripped off 64,000 euros (about $88,000) from poker tables at Les Princes Casino in Cannes, France in 2011. Here are eight casino scams that actually worked.

Although most cheaters get caught, there are others who manage to hustle casinos successfully. But some ambitious gamblers come up with schemes to beat the house for millions. The average person you'll find in a casino is playing honestly.

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