It is to be distinguished from a postage stamp used to pay the cost of posting a parcel, although there may no practical distinction as far as the sender is concerned.
The international parcel post service was established by the Universal Postal Union on 1 October 1881 (Great Britain, India, The Netherlands and Persia, 1 April 1882), following the agreement of 1880 in Paris.
A wide variety of parcel stamps have been issued in Britain by private road operators including bus and tram companies.
[4] The first Italian parcel stamps were issued in 1884 and since 1914 they have been in two parts[3] marked pacchi postali.
[3] In this series, which was soon discontinued, the 20-cent value is noteworthy for being the first postage stamp in the world to depict an airplane.