Handstamped on a cover, it indicates that postage due has been charged. Several countries have used regular stamps with a perforated initial T as postage dues. This may be lines, bars, letters, part of the design area or the entire stamp surface. Some stamps are issued both with and without tagging. Catalogs call them tagged or untagged.
Telegraph stamps resemble postage stamps.
Two or more unsevered stamps, one of which is inverted in relation to the other. A collection of stamps or covers relating to a specific topic. The topic is expanded by careful inquiry and is presented as a logical story. See also Topical. A stamp is said to be tied to a cover when the cancel extends over both the stamp and the envelope paper.