Field guide
Infrared / RFID Card Reading
How it works
The use of hidden electronic devices to read invisible markings on cards or RFID chips embedded in cards, transmitting hole card information to cheaters in real time. Cards are marked with invisible barcodes or infrared ink on edges or backs. Hidden cameras in chip trays, phone cases, or clothing read the markings. RFID-enabled cards can be scanned by hidden readers. Information is relayed to the cheater via earpiece, phone, or vibrating device.
On the record
The 2025 federal indictment against the alleged mob gambling ring described “electronic poker chip trays that could secretly read cards on the table, decoy phones that could detect which cards were on the table, and cards whose marks showed only through specially designed contact lenses or sunglasses.” In 2025, the JokerStars poker club in Houston said three players swapped in RFID cards and used a concealed reader. The club said one confessed and was banned and the other two left before they were questioned. No court record was found.
Detection & preventionADVISORY
The paid halfHow a monitoring room catches infrared / rfid card reading, and what stops it recurring, written for the desk, not the reader.
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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.