(JNS) At least three complaints to Iowa’s Department of Transportation have resulted in an official request for the owner to change a license plate with characters resembling the title of Adolf Hitler’s autobiography.

The Des Moines Register reported on Tuesday that an individual possessed a plate on their BMW reading “M3INKPF,” which some drivers interpreted as Mein Kampf. While in a German prison, Hitler wrote an infamous manifesto about his life using that title; it was published in 1925 and has sold millions of copies.

BMW has acknowledged its Nazi connections during World War II.

After an image of the vehicle circulated online, some users offered explanations for the signage, saying it referenced a BMW model and that the factory utilized a software called WinKFP.

The Iowa Department of Transportation requires those who request vanity license plates to explain their meanings. The person in question wrote, “bmw-m3 for me ink my personal friends at a tattoo artist.”