Field guide
String-Attached Coin (Advanced Yo-Yo)
How it works
An evolution of the classic coin-on-a-string cheat using modern materials to defeat improved coin slot sensors. Cheaters use thin monofilament line rather than string, drill precise holes in coins, or use tape that leaves minimal residue. The coin passes through modern rotating blade sensors but is still recoverable.
On the record
The yo-yo and its variants landed numerous cheaters in Nevada’s Black Book before coinless machines rendered it obsolete.
Detection & prevention
The paid halfHow a monitoring room catches string-attached coin (advanced yo-yo), and what stops it recurring — written for the desk, not the reader.
Detection · 22 words
Prevention · 21 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.