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.

While the dealer's eyes are momentarily distracted by the sudden commotion, the extra high-denomination chips are seamlessly slid onto the winning betting circle.
Past posting involves adding chips to a bet after the player already knows they have wonIt is also called "late betting" and is most common on the crowded, chaotic roulette tablesCheaters use palm-palming techniques to hide the extra chips in their hands How Players Manipulate the Deck
Cheaters attempt to destroy this mystery by physically marking the high-value cards (like Aces and Faces) so they can be identified from the back.

A more sophisticated, highly controversial method popularized by poker legend Phil Ivey is known as "edge sorting."
The Mechanics of a Craps Scam
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.
Scam NameRequired Skill LevelDetection DifficultyDice SlidingExtremely High (Physical skill)Low (Dealers watch the throw closely)Invisible InkLow (Requires tainted deck)High (Requires UV light to detect)
Attempting to cheat a modern casino is an incredibly foolish endeavor that almost universally ends in severe felony charges and prison time.