Detecting Counterfeits in Old Bills
Answer by Barry Thompson, BOL Guru Guru BIOS
Question: How do you detect a counterfeit bill from the 1950s? We had a customer who used the counterfeit pen and the mark turned black. Does this indicate this old bill is really a counterfeit.
Answer: I have been told that the pen is only 80% accurate and with old bills it almost never is accurate. The reason for this is the fibers used in currency has changed over the years and therefore old bills have a different fiber content.
With older bills we must rely on the feel and printing quality of the currency to determine its authenticity or place a call to the Secret Service.
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