The Mustafa-letter (Norwegian: Mustafa-brevet) was a controversial letter which the chairman of the Progress Party, Carl I. Hagen, used in the electoral campaign for the 1987 local elections. The letter was signed Mohammad Mustafa, a Muslim immigrant to Norway, but the media soon proved the letter to be false. The letter became controversial, both in the manner it was used by Hagen, and the claim of it being a fraud. The letter was dated 8 July 1987, and read as follows: The Progress Party almost doubled its share of the votes for the 1987 local election, compared to the local election in 1983.