Part IV: Financial Fraud · Internal Collusion & Employee Fraud · #8.3

Dealer Hole-Card Peeking and Signaling

How it works

In casinos that still use manual peeking (without electronic hole-card readers), a dealer who peeks at their hole card when checking for blackjack gains valuable information. A dishonest dealer can convey this information to an accomplice through subtle signals. The most effective approach uses a simple binary signal: “Will I have to take at least one hit?” (i.e., does the dealer have a stiff hand 12-16, or a pat hand 17-21?). This minimal information gives the player a significant advantage without requiring an elaborate signaling system. Signals can include body positioning, hand placement, verbal inflections in normal conversation, or direction of gaze. For example, a dealer might change the way they say a routine word, such as “insurance,” depending on the hole card.

Where it appears

Blackjack tables where dealers manually peek at hole cards (less common in modern US casinos with hole-card readers, still prevalent in some jurisdictions internationally)

On the record

In a 1997 Las Vegas case, dealer Laura Hernandez and Roger McElfresh, an executive overseeing construction of the Venetian, were arrested and charged after prosecutors alleged she exposed cards to him at blackjack at the Orleans; gaming control officers identified 113 possible criminal incidents. Peek devices and hole-card readers let the dealer check for blackjack without seeing the hole card, which removes much of this opportunity.

Published as a detection reference for surveillance, compliance and gaming-operations professionals. Thresholds and tuning are set by the property. Nothing here is instruction: the method is described so it can be recognised.