Before the 1970s, stamp manufacturing in the United States was exclusively a government function. Today, Sennett Security Products has been one of the company s connected with the United States Postal Services alternative-source stamp manufacturing program. The company has printed stamps for a range of categories including statehood stamps, Olympic commemoration, famous individuals, historic commemorations and seasons. Holographic stamps are among the line of specialty stamps printed by the company. Sennett also produces secure, optically verifiable labels to fight counterfeiting in areas outside the postal service. These labels employ optically verifiable scrambled indicia, whereby the client can quickly verify the authenticity of its product.