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DE The Griffin Book Explained: Casino Blacklists and Shared Player Watchlists
In casino slang, the Griffin Book means a shared blacklist. It is a record of people a casino wants to watch or keep out. Entries often include a name, photo, and a short note about why the person was flagged. Casinos use it to reduce cheating and protect their games. Skilled players, especially those practicing blackjack card counting, were sometimes included even when they were not cheating.
How the Griffin Book Got Its Name
The phrase comes from Griffin Investigations, a private casino security company that built profiles on suspected cheaters and advantage players and shared them with casinos that paid for the service. People also say “black book” to mean exclusion lists. Some are official lists kept by regulators, while the Griffin Book idea is private and shared within the casino industry.
What Casinos Use It For
Casinos rely on watchlists for a few common tasks:
- To alert staff when a known cheater, scammer, or suspected advantage player arrives;
- To share photos and notes between properties;
- To decide whether to monitor, limit, or end someone’s play;
- To connect patterns like repeated big wins or coordinated team activity.
Example: A Player Gets Backed Off Blackjack
You sit at blackjack and start raising your bet only at certain times. A floor supervisor notices the pattern and reviews camera footage. They decide you might be counting cards. The casino may shuffle sooner, move you to a different table, or tell you that you can no longer play blackjack there. If staff believes you are a risk, they may take your photo, write a short note, and add it to their internal list. Later, at another casino that shares the same database, staff may recognize you and limit your play right away.
Online Casinos vs Physical Casinos: Key Differences
Online casinos usually cannot identify players by face. Instead, any watchlist notes are tied to your account, device data, and payment method. Flags often relate to online issues like bonus abuse, unusual betting patterns, or failed identity checks. In physical casinos, staff can spot and track people in person. Security and floor teams use cameras and table observations, and may rely on photos or internal notes. If you are flagged, you could be watched closely, limited to certain games, or asked to leave.
FAQ
Is the Griffin Book still an actual book?
The classic version was a physical binder, but modern versions are mostly digital databases used by security teams.
Does being listed mean you committed a crime?
Not always. Some entries were for clear cheating, but others were for legal advantage play, like card counting.
Can a casino remove you even if you did nothing illegal?
Often yes. A casino is private property and can refuse service, as long as it follows local laws.
What should you do if the staff tells you to stop?
Stay calm, stop playing, and leave if asked. Arguing usually makes the situation worse.
