Since the very first casino opened its doors, an endless war has raged between the operators trying to protect their money and the criminals trying to steal it.

Cheating is no longer about complex card counting (which is technically legal); it is about physically manipulating the cards, the dice, or the chips after the outcome is known.
Understanding the "Past Posting" Scam
If they win a hand of blackjack, their original $10 bet is magically transformed into a $100 bet right before the dealer pays them out.

Often, a confederate (an accomplice) will intentionally spill a drink or loudly argue with a waitress at the exact moment the cheater makes the move.
Modern roulette tables feature advanced sensors to detect any chip movement after the ball dropsDealers are trained to intensely stare at the chips immediately after announcing the winning numberPast posting is a severe felony offense, not a simple misunderstanding of the rules How Players Manipulate the Deck
In card games like Blackjack and Baccarat, the entire house edge relies entirely on the fact that the next card in the shoe is a complete mystery.

Edge sorting relies on finding tiny, microscopic manufacturing defects in the geometric patterns printed on the absolute back edge of the casino's playing cards.
How Cheaters Manipulate the Dice
The craps table is extremely difficult to cheat due to the massive size of the table, the required wall-bounce, and the presence of four highly trained dealers.

By keeping the desired number facing upward during the entire slide, they only have to worry about the random outcome of the second tumbling die.
Cheater ActionDealer Counter-MeasurePinching (Stealing back a lost bet)Clearing losing bets before paying winnersMarking Cards with fingernailsReplacing the entire shoe of cards frequently
The glamorous era of casino cheating has largely been eradicated by incredibly advanced facial recognition, RFID-chipped betting tokens, and relentless surveillance.