Several reporters from FNS traveled aboard the USS Enterprise-B during her maiden voyage in 2293. Many of the reporters were utilized as "nurses" following the rescue of the El-Aurian passengers from the SS Lakul. (Star Trek Generations)
Several weeks before the beginning of the Dominion War, Jake Sisko became a reporter for the Federation News Service. He remained on Deep Space 9 when the Dominion forced the Federation to abandon it, to report on the impending Occupation. In early 2374, he attempted to obtain an interview with Weyoun, the Dominion's Alpha Quadrant administrator, for the FNS. Weyoun refused, claiming his reports were biased against the Dominion. Weyoun had also not transmitted Jake's earlier reports to the Federation News Service for the same reason. When asked about freedom of the press, Weyoun simply remarked that such beliefs were naive. (DS9: "Call to Arms", "A Time to Stand")
It is unknown whether the Federation News Service is a state-supported agency.
In DS9: "Call to Arms", Jake first identifies the news organization as the Starfleet News Service, but later in the episode it is referred to as the Federation News Service. The script refers to it as the Federation News Service throughout.