Universal Postal Union is a UN body that manages the relationships between different national post offices. They set standard rates and stuff for all member cou

Universal Postal Union is a UN body that manages the relationships between different national post offices. They set standard rates and stuff for all member countries so that each country doesn't have to negotiate a treaty with any other country it wants to send international mail to. https://en.wikipedia.org/wiki/Universal_Postal_Union https://en.wikipedia.org/wiki/Universal_Postal_Union