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.

The casino's "Eye in the Sky" catches most of them eventually, but recognizing the signs of a scam unfolding right next to you is a fascinating skill.
Understanding the "Past Posting" Scam
Past posting occurs when a cheater incredibly quickly and silently adds additional chips to their winning bet exactly a split second after the winning outcome is determined.

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
Historically, this involved utilizing invisible ink readable only with special contact lenses, or using a fingernail to create a tiny, microscopic dent in the cardboard.

By convincing the dealer to rotate specific high-value cards 180 degrees, the player can easily identify them before they are dealt, completely destroying the house edge.
How Cheaters Manipulate the Dice
However, highly skilled mechanics attempt a scam known as "dice sliding," which completely removes the random tumble of the dice.

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
If you suspect a player at your table is manipulating the game, simply walk away and let the eye in the sky do its job.