The listing, 2006 ONE FEDERAL RESERVE NOTE STAR DOLLAR (F 05781039 *) has ended.
Star notes are used by the BEP (Bureau of Engraving and Printing) to replace misprinted/damaged currency before it goes into circulation. These replacement notes are printed just like normal notes, except there is a star printed in the serial number. On Federal Reserve Notes, the star is where the block letter normally is (the last letter of the serial number). On Legal Tender notes and Silver Certificates, the star is where the prefix normally is (the first letter of the serial number).