The White Swords are an organization based in Wavemeet, the Ivy District in particular.
The guild liason is Abbadar, a half-elf that helps with accepting and handing out various contracts from and to aventurers that belong with the organization, known as White Swordsmen and Swordswomen.
The organization, a loose coalition of member guilds and solo individuals, classifys contracts – and heros- on a three tier scale. Tier one, the lowest, are resigned to simple chores, run quests, simple clear out and guarding duties, and rather redimentary quests. Tier two tend to get the most fun, clearing dungeons, collecting bounties or alchemical ingredients from fierce beasts, and the like.
Tier three get all of that, but are often given top secret missions, being contracted out and hired by powerful organizations like the Lords’ Alliance, the Order of the Gauntlet, the Emerald Enclave, and in shady time, even the Zhentarim.
Above all these heroes are the guild founder and of course the guild administrator, known as the Headmistress.
The Guild of the Golden Order has mentioned working for the White Swords a few different times.