Poker is utterly unique among casino games because you are not playing against the house; you are playing against the other players sitting at the table.

While the vast majority of live poker games are completely honest, the history of the game is deeply intertwined with scams, angles, and outright cheating.

If you are playing live poker in a casino, and especially in an unregulated underground home game, you must be your own first line of defense.

We will teach you how to spot a cheater so you can protect your stack and ensure the integrity of the game.

Spotting the Signals: How Collusion Works

Collusion occurs when two or more players sitting at the same table are secretly working together as a coordinated team against the rest of the players.

If a colluder knows their partner holds an Ace, they know exactly what cards are NOT in the deck, drastically altering their own mathematical odds of winning.

The colluders are simply inflating the pot using the combined strength of their hands, knowing they will split the stolen profits in the parking lot later.

If two players are incredibly friendly but never play massive pots against each other (often called “soft playing”), it is a massive red flag.

If you suspect collusion, do not confront the players directly at the table, as this usually causes a massive, dangerous argument.

The Classic Cheat: Marking the Deck

If a cheater knows exactly what the top card of the deck is, or what the player next to them is holding, the game is completely broken.

When the card is face down, the cheater can spot the tiny shadow of the dent or feel it physically when they handle the deck.

Another method is “daubing,” where a player uses a tiny speck of ash or specialized grease on their finger to smudge a specific pattern on the back of a card.

To protect yourself, watch how the other players handle their cards. If a player is constantly bending, aggressively squeezing, or digging their nails into the cards, be highly suspicious.

In a casino, you have the absolute right to request a fresh deck of cards if you suspect the current deck is compromised.

Angle Shooting: The Unethical Grey Area

They are not stealing from the pot or marking cards, but they are absolutely violating the spirit of fair play to gain an unfair advantage.

This is highly unethical behavior designed to extract physical “tells” without actually committing any money to the pot.

If the opponent flips their winning hand over, the angle shooter will claim, “I never said call, I said fold!” and try to pull their chips back.

An opponent might push all-in thinking they are calling a $100 bet, only to realize the angle shooter had a hidden $500 chip in the back.

The best defense against an angle shooter is strict adherence to the rules: always wait for the dealer to verbally confirm a bet before you act.

Common Red Flags at the Table

• Collusion (Soft Playing): Two players who are clearly friends suddenly stop aggressively betting against each other when they are the only two left in the hand.
• Marked Cards (Nail Nicks): A player aggressively digs their fingernails into the edges of the cards when lifting them to peek at the corners.
• Hiding the Big Chips: Stacking $100 chips behind walls of $5 chips to deceive you about the actual size of their bankroll.
• Base Dealing: If the dealer’s hand motions look unnatural, fast, or jerky, they may be manipulating the shuffle.

Action Plan: What to Do if You Spot a Cheat

Familiarizing yourself with the dark side of the game makes you a significantly sharper, more resilient competitor.

If a game ever feels suspicious, or if the players seem too coordinated, trust your instincts and pick up your chips.

There is absolutely no shame in walking away from a table where the math and the rules are compromised.