A “Friends Of” organization is a U.S. tax-exempt organization that generally advances charitable work associated with another U.S. organization or a foreign institution or cause. It may be closely identified with one overseas hospital, university, museum, or relief organization. The organizations may share a name, history, mission, supporters, and fundraising priorities. They may collaborate every day. For those Friends Of organizations that support foreign entities, the IRS has very specific requirements on how they can operate and send the funds abroad.