Obsolete currency (often called copyright or damaged copyright) was issued by banks in the course of the antebellum and Civil War era through the 1780s by 1866 in the United States. Presumably backed by gold, this currency was used regionally to simplify commerce for transactions demanding gold coins. https://fake-us-trade-dollars68876.verybigblog.com/32348970/counterfeiting-money-in-the-usa-options