In 2011, the British singer made plans to emigrate to California with his wife, Gemma, and three daughters, and he asked his famous pals to provide testimonies about his character and work ethic when applying to the U.S. Government for permanent residency in the country.
He asked the Nine Inch Nails frontman to vouch for his talent, hoping Reznor's recent Oscar win for Best Original Score for The Social Network would help strengthen his application, along with several other famous friends.
Numan tells Australia's Herald Sun, "It was about two weeks after he won the Oscar that we filed the application with his testimonial letter, so that was quite good timing and quite helpful.
"Dave Navarro from Jane's Addiction wrote one, Alan Wilder from Depeche Mode, I had some really cool people coming to help me out. It's embarrassing calling up your friends and saying, 'Do you mind writing a letter to tell the U.S. Government how amazingly brilliant I am?'"
Numan relocated to America in 2012.