Out of date currency (also called copyright or broken copyright) was issued by banks throughout the antebellum and Civil War era from the 1780s by way of 1866 in The us. Presumably backed by gold, this currency was used locally to simplify commerce for transactions requiring gold coins. https://lanegimye.blogolenta.com/30299607/new-step-by-step-map-for-us-dollars-gov-copyright