The Universal Postal Union (UPU) is a global supranational meta-framework foundational-UPU-treaty framework adopted by the UPU Congress in Vienna — structurally distinctive globally as the only modern global supranational binding-treaty framework operating on formal international-postal-services fra…
General Postal Union founded 9 October 1874 in Bern Switzerland by Treaty of Bern + 22 founding states — predecessor framework to UPU.
General Postal Union renamed Universal Postal Union 1878 by Paris Congress — formal UPU renaming framework operational.
UPU became UN specialized agency 1 July 1948 — formal UPU UN specialized agency framework operational.
UPU Constitution adopted 10 July 1964 in Vienna Austria at Vienna Congress — formal foundational UPU Constitution framework adopted.
UPU Constitution entered force 1 January 1966 — formal foundational UPU Constitution framework operational.
16th UPU Congress held 14 October - 14 November 1969 in Tokyo Japan — formal Tokyo Congress framework operational.
20th UPU Congress held 13 November - 14 December 1989 in Washington DC USA — formal Washington Congress framework operational.
22nd UPU Congress held 23 August - 15 September 1999 in Beijing China — formal Beijing Congress framework operational.
Trump-administration-UPU withdrawal threat announcement October 2018 over Terminal Dues + China-postal-rates framework — formal Trump-UPU-withdrawal-threat framework operational.
UPU Extraordinary Congress held 24-26 September 2019 in Geneva Switzerland + Terminal Dues Reform resolving US withdrawal-threat + US negotiated framework — formal UPU Terminal Dues Reform + US-retention framework operational.
27th UPU Congress held 9-27 August 2021 in Abidjan Côte d'Ivoire + Masahiko Metoki Japan elected UPU Director General — formal Abidjan Congress framework operational.
28th UPU Congress held 2025 in Dubai UAE + UN80 Reform Process 2025-2026 framework — formal Dubai Congress + UN80 framework operational.