The United Nations Postal Administration (UNPA) is the postal agency of the United Nations. It issues postage stamps and postal stationery, denominated in United States dollars for the United Nations offices in New York, in Swiss francs for the offices in Geneva and in euros (formerly schillings) for the offices in Vienna. Postage rates charged are identical to those of the host nation.
Only United Nations stamps in the appropriate currency may be used at a given United Nations office. In practice, however, most UN agencies use meters, and the stamps are most often used by tourists and collectors. Since the stamps may not be used outside the UN offices, they may be purchased in bulk on the secondary market as discount postage at well below face value.
On September 4, 2007, the UNPA posted on its Web page new rules limiting the mailings it will accept. Express mail and Priority Mail are no longer available to the public, and mailings from the public are limited to 100 pieces. The UNPA stated that the reason for this is that it was not established to provide all postal services, and that its primary function was to issue stamps for philatelic purposes.
The idea for the UN to issue stamps originated in 1947 with José Arce the ambassador from Argentina and president of the United Nations General Assembly, who was himself a philatelist. (The League of Nations had used overprinted Swiss stamps.) The UNPA came into existence by agreement with the U.S. in 1951, soon after the UN moved into its headquarters in Manhattan. Prior to that, the UN used the facilities of the United States Post Office Department.