Star Notes were first used in 1910. They were produced in all demoninations with the sole intent of replacing notes that are removed from regular production for a variety of reasons: research, testing or because of damage. A star note has the security features of other notes. A star note is distinguishable by a star in lieu of a suffix letter at the end of its serial number.
Prior to the use of star notes, notes were replaced with exact duplicates bearing identical serial numbers. However, as production requirements increased, a more expeditious way of replacing notes became needed. Thus, star notes use began to expedite the replacement process and maintain production schedules.
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