The US Bureau of Engraving and Printing unintentionally produced several batches of one-dollar bills with identical serial numbers in 2014 and 2016, thereby rendering each one a fake.
However, there was little anyone could do because this error was discovered after the money had already been disbursed.
Since money moves so quickly, it is quite impossible to match up the 6.4 million pairs of duplicate one-dollar bills that are now in circulation. There are just 37 pairs found as of the publication date.
However, this isn't deterring coin and cash collectors across the country. By only verifying your own one-dollar bills, you may assist them in their quest to find the remaining pairs and earn a little cash in the process.
First, look at George Washington's photo and see the series date. Make that the bill has a "B" Federal Reserve Seal above the serial number if it says "Series 2013."
Last but not least, if both of those are present, see if the serial number has a star (*) that is between B00000001* and B00250000* or B03200001* and B09600000*.
If so, you may be among the fortunate few who have one of the duplicate bills.