Part III: Slot Machine Cheating · Physical Cheating Methods · #5.7
Backing Up the Chute
How it works
An old cheating technique attempted primarily on slant-top (bar-top) slot machines. As the machine paid out coins, the cheat would attempt to push coins slightly back up into the coin payout chute. If successful, this would close the gap between the coins and the machine’s internal mechanism, causing the machine to drop two or three coins but count only one. Repeated attempts could extract extra coins from the machine.
Where it appears
Slant-top mechanical slot machines with open coin payout chutes.
On the record
Documented in George Joseph’s slot cheating training materials. This technique required deft hand coordination and was limited to specific machine designs with accessible payout chutes.
Detection & prevention
The paid halfHow a monitoring room catches backing up the chute, and what stops it recurring — written for the desk, not the reader.
Detection · 33 words
Prevention · 20 words
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.