Internal Revenue stamps and postage stamps were a big part of the Bureau of Engraving and Printing's history. The BEP began producing revenue stamps in 1866. These stamps were used well into the twentieth century to collect excise taxes. Producers of goods subject to excise taxes were required to place a government stamp, known as a revenue stamp, on their product to prove that the tax had been paid. Postage stamp production started at the BEP in 1894 and continued until 2005 when production was given to private printing firms.
For further information on this topic, specific questions may be addressed to the Historical Resource Center.
National Postal Museum
Contains the papers presented at the Winton M. Blount Symposium on Postal History.