Telegraph stamps are stamps intended solely for the prepayment of telegraph fees.[1] The customer completed a telegraph form before handing it with payment to the clerk who applied a telegraph stamp and cancelled it to show that payment had been made. If the stamp was an imprinted stamp, it formed part of the message form.[2]
^The Stamp Collector's Encyclopaedia by R.J.Sutton & K.W. Anthony, Stanley Paul, London, 1966, p.240. ISBN0-340-17183-9
^Bennett, Russell and Watson, James; Philatelic Terms Illustrated, Stanley Gibbons Publications, London (1978)