Silver certificates are a type of representative money issued between 1878 and 1964 in the United States as part of its circulation of paper currency. They were produced in response to silver agitation by citizens who were angered by the Fourth Coinage Act, which had effectively placed the United States on a gold standard. The certificates were initially redeemable for their face value of silver dollar coins and later (for one year – 24 June 1967 to 24 June 1968) in raw silver bullion. Since 1968 they have been redeemable only in Federal Reserve Notes and are thus obsolete, but still valid legal tender and thus are still an accepted form of currency.
Large-size silver certificates (1878 to 1923) were issued initially in denominations from $10 to $1,000 (in 1878 and 1880) and in 1886 the $1, $2, and $5 were authorized. In 1928, all United States bank notes were re-designed and the size reduced. The small-size silver certificate (1928–1964) was only issued in denominations of $1, $5, and $10. The complete type set below is part of the National Numismatic Collection at the Smithsonian's National Museum of American History.
The Coinage Act of 1873 intentionally omitted language authorizing the coinage of “standard” silver dollars and ended the bimetallic standard that had been created by Alexander Hamilton. While the Coinage Act of 1873 stopped production of silver dollars, it was the 1874 adoption of Section 3568 of the Revised Statutes that actually removed legal tender status from silver certificates in the payment of debts exceeding five dollars. By 1875 business interests invested in silver (e.g., Western banks, mining companies) wanted the bimetallic standard restored. People began to refer to the passage of the Act as the Crime of '73. Prompted by a sharp decline in the value of silver in 1876, Congressional representatives from Nevada and Colorado, states responsible for over 40% of the world’s silver yield in the 1870s and 1880s, began lobbying for change. Further public agitation for silver use was driven by fear that there was not enough money in the community. Members of Congress claimed ignorance that the 1873 law would lead to the demonetization of silver, despite having had three years to review the bill prior to enacting it to law. Some blamed the passage of the Act on a number of external factors including a conspiracy involving foreign investors and government conspirators. In response, the Bland–Allison Act, as it came to be known, was passed by Congress (over a Presidential veto) on 28 February 1878. It did not provide for the "free and unlimited coinage of silver" demanded by Western miners, but it did require the United States Treasury to purchase between $2 million and $4 million of silver bullion per month from mining companies in the West, to be minted into coins.