A United States Note, also known as a Legal Tender Note, is a type of paper money that was issued from 1862 to 1971 in the United States. Having been current for 109 years, they were issued for longer than any other form of U.S. paper money other than the currently issued Federal Reserve Note. They were known popularly as "greenbacks", a name inherited from the earlier greenbacks, the Demand Notes, that they replaced in 1862. Often termed Legal Tender Notes, they were named United States Notes by the First Legal Tender Act, which authorized them as a form of fiat currency. During the early 1860s the so-called second obligation on the reverse of the notes stated:This Note is a Legal Tender for all debts public and private except Duties on Imports and Interest on the Public Debt; and is receivable in payment of all loans made to the United States.