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If you take a close look at an authentic banknote, you can see that there are very small red and blue threads woven into the fabric of the bill. The security thread on authentic bills glow under ultraviolet light in the following colors: Below is a list of the microprinted phrases on authentic banknotes:Ĭounterfeit detection tools and technology use ultraviolet light because this is a clear-cut way of telling if a bill is counterfeit. In the $10 and $50 bills the security strip is located to the right of the portrait, and in the $5, $20, and $100 bills it is located just to the left.Īuthentic bills have microprinting in the security thread as another layer of security. The security thread is a thin imbedded strip running from top to bottom on the face of a banknote. If you don’t feel this texture, then you should check the bill further. You should feel some vibration on your nail from the ridges of the raised printing. To detect raised printing, run your fingernail carefully down the note. If the microprinting is unreadable, even under a magnifying glass, it is probably counterfeit.Īll authentic banknotes have raised printing, which is difficult for counterfeiters to reproduce. Authentic banknotes also have microprinting, or finely printed text located in various places on the bill. Take a close look, especially at the borders, to see if there are any blurred parts in the bill. Counterfeit printers are usually not capable of the same level of detail. Authentic bills are made using die-cut printing plates that create impressively fine lines, so they look extremely detailed. If there is no watermark or the watermark is visible without being held up to the light, the bill is most likely a counterfeit.Īn automatic red flag for counterfeit bills is noticeably blurry borders, printing, or text on the bill.Sometimes counterfeits bleach lower bills and reprint them with higher values, in which case the face wouldn’t match the watermark. If the watermark is a face, it should exactly match the face on the bill.The watermark should be on the right side of the bill.The watermark should only be visible when you hold the bill up to the light.Here are some things to keep in mind when looking at a bill’s watermark:

On other banknotes, it is just an oval spot. Many of the new bills use a watermark that is actually a replica of the face on the bill. The watermark is a characteristic security feature of authentic banknotes.