Back in April of 2018, former Donkey Kong record-holder Billy Mitchell had two of his high scores removed from the Twin Galaxies leaderboards, as they were found to be achieved through illegitimate ways. Mitchell has always maintained that the scores were legit, and now he's escalating those claims with legal action.
Mitchell's lawyers sent a letter to Twin Galaxies and Guinness World Records saying that both organizations had to “retract their claims against Billy Mitchell” and restore his old scores. When Twin Galaxies remove Mitchell's scores and banned him from submitting new ones, they also threw out his previous records in other games, which were achieved legitimately, as far as anyone knows. Mitchell claims that both parties have defamed him, and tainted all of his work up to that point.
Twin Galaxies and Guinness World Records are yet to comment on the matter.