Simply mark the bill anywhere, a black or brown mark means the bill is counterfeit, a clear or slight yellow mark means the bill is genuine. Marks on genuine bills disappear within 24-48 hours.
The pen also works on most foreign currencies in circulation, with the exception of Canadian currency.
- Detects Counterfeit Bills
- Safe Formulated Chemical
- Disappears 24-48 hours
- Works on most Foreign Monies