Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1)

Good works

I tried it on some of my own money. Seems to be fine. I'm gonna pull out the pen when I get change at Walmart. Instead of them looking at the bills, I'm gonna look at the bills.

These are the best counterfeit pens!! Accurate quick simple to do!

Good product and price!

They work well. Would have liked for them to be a bit darker but they work.

Reliable and gets the job done.

Tiene muy buena calidad, pensé que no sería muy efectivo la verdad, pero supero mis expectativas, lo recomiendo 100% muy bueno la verdad

The other day at Walmart a man at self check out asked me to pay for his stuff on my card and that he had cash for me (about 100 bucks). He asked me because he said he didn't realize the self check out was card only. The line was backed up and I couldn't say no. I felt great that I helped him and he gave me an additional 10 Dollars for my trouble, thanked me, and we parted ways. When I got to my car I had a bad feeling and for some reason the money felt "fake" to me (maybe because i very rarely carry cash). I was scared to use the cash in case it was fake and went to the store to get one of these pens but they were out so I ordered here on Amazon and just waited to test. All the cash he gave was legit and clearly I was just paranoid but none the less I have a peace of mind to check in the future again when needed.

Lo use en una hoja de maquina y marco negro. Luego lo use en un billete de dolar en tres puntos distintos y en todos dio un tono diferente. En lo personal, no me ayuda mucho

Fonctionne bien

After getting a fake 20 here in Canada we opted to get this to check USD this has saved us over $60 so far. Well worth the money

It works perfectly and on all kind of money. Fast shipping and will again.

Perfect