Hi,
I noticed that the serial numbers on one of my polymer $20 bills look smudged. I understand that errors with serial number inking are often not recognized because they are easy to remove or fidget with chemicals (e.g. missing digits). Would you consider this a legitimate error, or could these have been tampered with? If this is a legitimate error, what may have caused the smears? Thanks!


While that side has a little smear, this is the side that I really want to know about:
