The listing, COUNTERFEIT MONEY DETECTOR PEN has ended.
I have a dri-mark brand, counterfeit detector pen. you draw on the bill. if it is a yellow or clear line, then it is ok. if it makes a brown or gray line, then the bill is fake. i tested it by drawing on regular paper then on a dollar bill. does exactly what its supposed to do. this is the same pen that is used at stores when you give them a $100 bill. they run this pen over it. good luck to all who bid!!