In the U.S. Bureau of Engraving and Printing , more than one engraver will work on the same printing plate , making it nearly impossible for any person to duplicate all the engraving on almost any banknote or document . In the U.S. Bureau of Engraving and Printing , more than one hand engraver will work on the same plate , making it nearly impossible for one person to duplicate all the engraving on a particular banknote or document .