The Bureau Of Engraving and Printing only makes these " replacement sheets " or star note sheets , due to the need to reprint some sheets that have been printed with some error of some kind . I once also thought they replaced the first batch of sheets with the same serial numbers , but actually all of the original sheets , are all replaced with different serial numbers , as the original sheets are shredded . Although , there are actually some Federal Reserve Notes that do have the same serial numbers , only made by mistake by the BEP . So , I'm not actually sure what happens when a replacement sheet is printed with an errors , but I don't believe any notes of any kind ever have had 2 stars on a note .