Silver Certificates are a type of representative money printed from 1878 to 1964 in the United States as part of its circulation of paper currency.[1] They were produced in response to silver agitation by citizens who were angered bythe Fourth Coinage Act, which had effectively placed the United States on a gold standard. The certificates were initially redeemable in the same face value of silver dollar coins, and later in raw silver bullion. Since 1968 they have beenredeemable only in Federal Reserve Notes and are thus obsolete, but are still valid legal tender.