C-FY-007 Counterfeit detector Pen
One more tool to detect counterfeit bills.
This Pen is specially for all Currency.
Mark the bill with a cross or a line in an area which is lightly colored or not printed on.
On a legal bill there will be a clear or light yellow line which may disappear after 15 seconds.If the bill turns violet,bule,green or brown it is a fake.