A suburban Kansas City man has pleaded guilty to sending fake IRS letters to former girlfriends and business partners telling that they were under investigation for tax evasion.

The U.S. attorney’s office says that 56-year-old Jeffrey Nickerson, of Lenexa, Kansas, pleaded guilty Monday to one count of impersonating a federal employee. Nickerson sent letters on IRS letterhead that said the victims were under investigation as a result of reports being filed to the IRS Fraud Investigations Hotline.

He knew a woman who worked at the IRS Service Center in Kansas City, Missouri, and admitted to using information gleaned from the IRS letterhead and publications she brought home with her.

Nickerson faces up to three years in federal prison and a fine up to $250,000. The sentencing date hasn’t been set.