Star on the one hundred dollar bill?

Answer 1

The star next to the serial number on a US $100 bill (or any US bill, for that matter) means that it is a replacement bill. In the dollar bill production process, 32 bills are printed on a single sheet (4 bills by 8 bills). The sheets are stacked 100 high and then cut, resulting in 32 stacks of 100 bills each (with the last two digits in order from "00" through "99"). Each sheet is inspected, however, before being added to the stack to be cut - should an error be found, the sheet is destroyed and a sheet of "star bills" is inserted in its place (so as not to foul up the count).

Answer 2

The star on the one hundred dollar bill is a part of the "Federal Reserve Recognition Star," a security feature designed to deter counterfeiters. It is located to the left of the portrait on the front of the bill.