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On August 2, 1921, the first charity stamps were issued in Luxembourg. The proceeds from the sale of the stamps were intended to finance the construction of a monument to the soldiers of the country who fell in the First World War.
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When an error is made in the design of a stamp, and incorrect information items are incorporated into it, the philatelic service is required to correct the error and not issue a stamp containing errors. Sometimes it is necessary to destroy the stamps that have already been printed and reprint corrected stamps, and sometimes it is possible to correct the stamps that have been printed and save on production costs.

A letter, which is part of an overprint, that deviates from its place and is above or below the line to which it belongs.

An envelope sent on the island of Trinidad documents an attempt by the local charity to collect donations for the Red Cross during World War I. The course of events turned this activity into a philatelic curiosity.