In July 1875, the General Postal Union or “GPU” (later, the Universal Postal Union or “UPU”) simplified the handling of international mail. Before the GPU, the United States entered into bilateral postal conventions with numerous other countries to facilitate the exchange of international mail.
The following are copies of many of the postal conventions to which the United States was a party before the GPU. Even though the United States joined the GPU in 1875, some of these bilateral conventions were in effect after 1875 because the other country party to the convention may not yet have joined the GPU or UPU.
Most of these conventions were copied from the United States Statutes at Large, Volumes 16, 17, and 18.
U.S. and Belgium
1863 U.S.-Belgium Convention
(While this Conventions was published, it never went into effect)
U.S. and Brazil
U.S. and Bremen
U.S. and British Columbia
1870 U.S.-British Columbia Convention
U.S. and Canada
U.S. and Ecuador
U.S. and France
1861 Amendments to the U.S.-France Convention
U.S. and German Empire
1871 U.S.-German Empire Convention
U.S. and Guatemala
1862 U.S.-Guatemala Convention
U.S. and Hamburg
U.S. and Hawaii
U.S. and Hong Kong
1867 U.S.-Hong Kong Convention
U.S. and Italy
1863 U.S.-Italy Convention
(While this Conventions was published, it never went into effect)
U.S. and Mexico
U.S. and Netherlands
1867 U.S.-Netherlands Convention
1870 U.S.-Netherlands Ammendments
U.S. and New Foundland
1872 U.S.-Newfoundland Convention
U.S. and New Zealand
1870 U.S.-New Zealand Convention
U.S. and Northern German Union
1867 U.S.-North German Union Convention
1870 Amendments to U.S.-North German Union Convention
U.S. and Prussia
1855-61 Amendments to the U.S.-Prussia Convention
U.S. and Salvador
U.S. and Sweden and Norway
1873 U.S.-Sweden and Norway Convention
U.S. and Switzerland
1867 U.S.-Switzerland Convention
1869 U.S.-Switzerland Convention
1870 U.S.-Switzerland Convention
U.S. and U.K.
1852-65 Amendments to the U.S.-U.K. Convention
1867 Amendments to the U.S.-U.K. Convention
1868-69 Amendments to the U.S.-U.K. Convention
1871 Amendments to the U.S.-U.K. Convention
U.S. and Venezuela
1865 U.S.-Venezuela Convention