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In a press release, Groupon announced a President's Day weekend discount of $10 off of $40, honoring Alexander Hamilton, who Groupon mistook as a former president.

The Friday announcement was titled, Groupon Celebrates Presidents Day by Honoring Alexander Hamilton, and urged customers to Commemorate a man historically powerful enough to be on money with $10 towards $40 on a local purchase while they last.

The release, still featured Sunday on Groupon's press page, states, The $10 bill, as everyone knows, features President Alexander Hamilton -- undeniably one of our greatest presidents and most widely recognized for establishing the country's financial system.

It also featured a picture of the $10 bill with the caption, President Alexander Hamilton on the $10 bill.

The first Secretary of Treasury, Alexander Hamilton, was a founding father, played a key role in writing the Constitution, was chief of staff to General George Washington and is considered the founder of the nation's financial system.

But he was never a president.

A media inquiry for comment was not immediately returned to USATODAY.

Some readers were quick to note that Groupon frequently uses humor and sarcasm in its promotions, and the error in fact may have been made on purpose.

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