Printing. US bills have raised printing, and all lines need to be sharp. Try to look for irregularities in definition amongst bills and strains wavering in thickness, coloration or clarity. This guideline can be a training resource for cashiers who really need to learn how to authenticate Federal Reserve notes. https://sociallytraffic.com/story1830564/top-latest-five-how-to-recognize-counterfeit-bills-urban-news