The fact-checking organization "Correctiv" (which was one of the first that got the privilege of marking shared links on Facebook as "disinformation") falsely claimed the right-wing AfD party planned to deport millions of non-Germans in a secret "Masterplan" ("Remigration") which of course did not happen which was confirmed by a court and later by Correctiv themselves.[1] This false report was repeated on every TV station, print and online magazine but the correction was not as widely shared (most people don't even know that the report was fabricated). Keep in mind that the Correctiv report lead to mass protests against the AfD and reactions from a lot of companies and government officials, so it had a HUGE impact.
The government also funds projects from Correctiv (a common pattern for these "N"GO's).