 Known as the stamping privilege , companies , associations and individuals were permitted to submit their own designed and pre @-@ printed envelopes , cards , letter sheets , etc . , to the Irish Post Office for impressing with an official post @-@ paid indicia . Window envelopes were popular for printed matter rate mail . The most prolific user was the Electricity Supply Board which used meter reading and appointment cards for over forty years . Stamped @-@ to @-@ order postal stationery users included Blackrock College , <unk> <unk> Éireann , Esso , Great Northern Railway , and John Player & Sons , Dublin . No stamped @-@ to @-@ order registered envelopes are known . Apparently An Post have withdrawn the stamping privilege without any public notice , because stamped @-@ to @-@ order postal stationery has seldom been seen since An Post took control of the Irish Post Office in 1984 , with only five users recorded by Jung . Between 1963 and 2000 a few <unk> influenced items are known produced by six users . 
