A Demand Note is a type of United States paper money that was issued between August 1861 and April 1862 during the American Civil War in denominations of 5, 10, and 20 US$. Demand Notes were the first issue of paper money by the United States that achieved wide circulation and they are still in circulation today, though they are now extremely rare. The U.S. government placed the Demand Notes into circulation by using them to pay expenses incurred during the Civil War including the salaries of its workers and military personnel.