A star used in printing that refers to a margin note is called an asterisk.
The star symbol (*) is commonly used in printing to denote a footnote or margin note. It directs the reader to additional information or commentary located at the bottom of the page or in the margin.
A "Star note" is a bank note that is reprinted due to a problem with the printing process and the original note being spoiled and not subsequently issued for circulation. A "Star note" is identified by the last digit of the serial number being a "star", hence the name. Many countries use the concept of a "Star note" to replace mishaps of the bank note printing process. The practice of "Star notes" ceased in Australia in about 1971. Star notes are very collectible as are the notes they are intended to replace, should one mysteriously find its way out of the note printing works.
A star note is a replacement note produced by the U.S. Bureau of Engraving and Printing to replace damaged or defective currency before it enters circulation. It has a serial number with a star at the end, indicating it as a replacement for an original note.
A star next to the serial number on any US bill means that the original note with that number was damaged in printing, and the star note is the replacement.
It is a star...If a note is found defective when inspected after printing, it is replaced with a "star" note (that is a note with a star before or after the serial number). It's a do over because the 1st one is damaged. They're worth more to collectors.
It is just a Star note. It replaces a note that my have been not up to the printing standard or just a miss print.
A $10 bill with a star next to the serial number is considered a replacement note and is worth face value, which is $10. The star represents that the original note was damaged during the printing process and this replacement note was issued in its place.
A star in the serial number signifies that the note is a replacement note. Replacement notes are used when a note is found damaged before leaving the Bureau of Engraving and Printing. Currency collectors tend to pay more for "star notes," as they are rarer than notes with standard serial numbers.
There's a link from the Bureau of Engraving and Printing below:
Face value. Star notes are used to replace individual notes on a sheet that are spoiled in printing, and are fairly common.
A "star" note is a replacement note. If a banknote was damaged or improperly printed during the banknote printing process, it was withdrawn from the batch prior to issue and a replacement note was printed to replace it. The last digit of the serial number was replaced with a "star". The practice of producing "star" notes was expensive and evenutally considered to be unnecessary. The last Australian "star" notes were printed in 1969.
The star at the end of the serial number signifies that the original note did not meet Federal printing standards and was replaced with that note.