Federation of Planets
The (United) Federation of Planets is another name for the Association of Worlds, which is an extraterrestrial organization that has been established for a number of purposes. See "Association of Worlds" for more information and links.
Please note that "Association of Worlds", "Federation of Planets", or "Federation of Planets" are merely different ways to denominate the same organization. Being an extraterrestrial organization, the original name of the organization is obviously not an English one. Both expressions are merely English translations of one and the same name, of one and the same organization. But note that the "Alliance of Worlds" is a different organization. To add to the confusion, recently several authors have started referring to this organization as the Galactic Federation.
Note that a lot of the information on the Federation is channeled, though corroborated by many contactees, and by some witnesses working on covert projects. Remote viewers, too, confirm the existence of such an organisation.