Common $20 banknote misprints include the missing green treasury seal. On the right side of the bill over “TWENTY,” the green seal is significant. Notes without this are misprinted.
A $20 bill with inverted serial numbers is a prized misprint. This rare inaccuracy is obvious. These flaws' visual impact and rarity attract collectors, increasing the bill's value.
The overprinting stage, which applies seals and serial numbers, can misprint a note. This could include smudged seals, missing serial numbers, or mismatched front and rear parts.
Star notes are rare since they repair damaged banknotes. But star notes with serial number misprints or missing seals can be worth more.
An error occurs when part of the paper currency is folded during printing, leaving a blank or partially printed region. Due to their rarity, collectors prize foldover faults.