Validator fraud targets the bill or coin validator — the component that accepts payment and signals the machine to award credits. Two methods dominate: fake-pulse injection (using an electronic device to generate false acceptance signals) and stringing (physically retrieving the bill or coin after acceptance). Both methods result in free credits for the cheater.
Fake-Pulse Injection on Validators
The validator communicates with the main board through a pulse line. When a valid bill or coin is accepted, the validator sends a specific number of pulses to indicate the value. A cheater with a pulse generator connected to this line can send pulses without any bill or coin being inserted. The device is typically connected through a clip-on tap on the validator’s wiring — no cabinet opening required.
The pulse generator is small — about the size of a matchbox — and can be triggered by a button in the cheater’s pocket or by a remote control. The cheater can generate credits while appearing to simply sit at the machine.
Stringing Attacks on Validators
Stringing on bill validators uses the same principle as coin stringing. The cheater attaches a thin string to a bill, inserts it into the validator, waits for the acceptance signal, and then pulls the bill back by the string. The machine has registered the credit, but the bill is retrieved and can be reused. This method works on validators that do not have a bill stacker or that have a visible bill path where the string can be attached.
How to Stop Both Methods
The Gen2 device’s validator protection module monitors the pulse line for fake signals. It analyzes the electrical signature of each pulse — voltage, duration, timing — and blocks any pulse that does not match the validator’s output profile. For stringing, the device analyzes the validator’s acceptance and stacking cycle timing. A string-retrieved bill produces an abnormal timing signature because the bill is pulled back before it completes the stacking process.
If your game machine with a bill or coin validator is showing signs of validator fraud, send me a message with your machine model and a photo of your setup. I will do a quick remote check for free. Every device comes with a money-back guarantee, official invoice, express shipping, and 1-on-1 technical support.
WhatsApp / WeChat / Phone: +86 158 1582 1587 — Engineer Wang
To discuss the best anti-cheat strategy for your specific arcade setup, message me directly. I offer a free remote diagnostic session.
Frequently Asked Questions
Q: How can I tell if my validator is being targeted with fake pulses?
A: Compare the validator’s acceptance count (recorded by the machine) against the actual bills in the cash box. A sustained discrepancy indicates fake pulses.
Q: Is stringing more common on certain validator models?
A: Stringing is easier on validators with exposed bill paths and no bill stacker. Note validators and older models are more vulnerable.
Q: Does the Gen2 device require calibration for different validator brands?
A: The module comes pre-configured with the pulse signatures for common validator brands. It can be calibrated for less common models during installation.
Q: Can the device be installed on machines with both bill and coin validators?
A: Yes. The module monitors multiple input lines simultaneously, covering both payment types with a single installation.