You cannot wear an organization tag in-game, whether it's official or not. Though, in a clan if it's official you can in fact wear the tag In-game. The difference between a clan and an organization is simple, clans are there for people to band together and compete in clan competitions and play the game and have fun with the rest of the clan. Organizations are created to help towards a certain cause, such as possibly helping others. It is also acceptable to be in multiple organizations but in clans it's different and in most cases you're not allowed to multi-clan.