headquarters are located in Bern, Switzerland where French is the official language, however English was added as working language in 1994. There are three main notions of the UPU; first, there should be a uniform flat rate to mail a letter anywhere in the world. Second, postal authorities should give equal treatment to foreign and domestic mail. Third, each country should retain all money it has collected for international postage. During the 17th and 18th centuries, the exchange of mail between countries…
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