Part II: Table Game Cheating · Roulette Cheating Methods

Scam #10: Ball Switching

How it works

The cheater or a confederate dealer replaces the casino’s standard roulette ball with a specially modified ball. The modified ball may contain a magnetic core, electronic components, different weight distribution, or be made of a different material that interacts with the wheel differently (e.g., a softer material that bounces less, or a harder material that skips over certain frets). The switch typically occurs during a distraction — a player may knock their drink over, a confederate may engage the dealer in conversation, or a staged argument may draw attention. In some cases, a dishonest dealer simply palms the original ball and introduces the modified one during a normal ball change procedure, claiming the original was “damaged” or needed replacement. The switch is reversed before the end of the shift to avoid detection during routine inspections.

Where it appears

All physical roulette variants

On the record

In 2003, a gang was arrested in Austria after winning $700,000 using a switched magnetic ball. The scam was discovered when the ball stuck to a dealer’s cufflink. Some casinos now use magnetic compasses on the table to test balls before each spin.

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.