Fourth Corner Exchange Inc is a sustainable community currency based in the Pacific Northwest United States. Founded in 2002 by Francis Ayley and a group of like minded friends, Fourth Corner Exchange started trading in January 2004, utilizing a basic Time Dollar system that has some features of LETS, but with important differences from both which are described on their website. There are presently over five-hundred and fifty members in Bellingham, Washington, Port Townsend, Washington, Everett, Washington, Mount Vernon, Washington, and Portland, Oregon. Prospective members must attend a new members meeting in order to join and trade with other members. Meetings are held in Bellingham, Port Townsend, Mount Vernon, Everett, Portland and many other locations.