Part II: Table Game Cheating · Dice & Craps Cheating Methods

Mouth Switch

How it works

A very crafty method of switching a single die into a game. The cheat conceals a gaffed die in their mouth (between cheek and gum, or under the tongue). When picking up the dice from the table, the cheat appears to place both dice in their hand but actually retains one legitimate die while the gaffed die is brought from the mouth into the throwing hand. This switch can also be done in reverse to remove the gaffed die from play. The method is particularly effective because a single die switch is harder to notice than a pair switch.

Where it appears

Street Craps, Private Games

On the record

A classic technique that has been used for centuries. The single-die switch is particularly dangerous because it is less likely to be noticed than switching both dice.

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.