The Mazenim news agency is among the 4 news agencies active in denying fake news. The investigation by the cyberspace communications headquarters in the country shows that between November 7 and 4, 1405, out of 197 fake news and suspicions identified, 72 cases were officially rejected, of which 47 cases, about 65 percent, were checked in the fake news monitoring room. The most visited news was the subject of the self-immolation of a doctoral student from the University of Tehran; Most of the reprints of the denials were related to news of Iran's response to Jay's letter. Dee Vance, and most of the fake news reprints were related to the claim that Iran and the United States were close to a deal. The average time for publishing the rebuttals was about five hours and 82% of them were published in the first 12 hours; However, some fake news was circulated for up to four days. Most of the rumors were about the Iran-US talks, the nuclear program, regional developments and social and local issues. Tehran, Mazandaran, Golestan, Alborz and Sistan-Baluchistan were on the list of regions and the most frequent news agencies such as Tasnim, Fars, Mizan and Sabdasima and institutions such as the Ministry of Foreign Affairs and the Ministry of Health were present in the denials. Rank in social networks.