It unites almost all countries of the world. White House says Universal Postal Union unfairly benefits Chinese groups shipping to US Staff and agencies in Washington Wed 17 Oct 2018 17.34 EDT Last modified on Thu 18 Oct 2018 09.49 EDT Union Postale Universelle and the Universal Postal Union) was founded in 1874 by an interstate organization to provide and improve postal relations in the single postal territory formed by the Universal Postal Union. Date of entry into the UPU: 01-03-1914 Contribution units: 25 Designated operator: China Post Packages with such numbers can be tracked right until delivery. By Jen Kirby Oct 19, 2018, 2:40pm EDT The Universal Postal Union (UPU; the international abbreviated name is UPU, from fr. Welcome to the public Website of the Universal Postal Union (UPU), the United Nations specialized agency for the postal sector. The tracking number in the format of the Universal Postal Union looks like RA123456789CN, where the first 2 letters are the type of package and the last 2 letters are the code of the country of origin. Here’s why Trump threatened to pull out of a 144-year-old postal treaty This is Trump’s weirdest move in the China trade war.