5x **STAR NOTES** 1957 $1 Blue Seal Silver Certificates Grades CU. When notes are discovered that have been printed incorrectly (such as having the serial numbers upside down, etc.) the misprinted "error notes" are replaced with star notes because no two bills within a certain series can be produced with the same serial number. They are used to maintain a correct count of notes in a serial number run. By their nature, star notes are more scarce than notes with standard serial numbers and as such are widely collected by numismatists. Some of the highest prices paid for modern (post-1928) U.S. banknotes have been for star notes . Silver Certificates were redeemable in Silver. One of their most distinctive qualities is the blue Treasury seal and serial numbers. These notes include an additional legend printed on the face that is not present on any other Federal Reserve notes. The legend states that Silver had been deposited in the Treasury and was payable on demand to the note’s bearer.