Those pens only detect starch. Counterfeiters learned to use starch free paper a very long time ago.
The pens essentially only work if an idiot makes a counterfeit bill.
The pens don’t work at all with any serious counterfeiting operation.
No. They may work on older genuine bills. See my post#26.
>>The pens essentially only work if an idiot makes a counterfeit bill.<<
When I got that $1. bill....my thought...what idiot would make a $1. bill?