A Lenexa man was sentenced Tuesday to five months he already served in jail for harassing former girlfriends and business partners by sending them letters on Internal Revenue Service letterhead.

Officials say Jeffrey Nickerson used IRS letterhead and publications brought home by an acquaintance who worked for the agency.

Acting U.S. Attorney Tom Beall said Nickerson, 56, pleaded guilty to one count of impersonating a federal employee. In his plea, Nickerson admitted he was an acquaintance of a woman who worked at the IRS Service Center in Kansas City, Mo. She brought IRS letterhead and IRS publications home.

He admitted he used the information to send letters to former girlfriends and former business partners. The letters said the victims were under investigation as a result of reports being filed to the Internal Revenue Service Fraud Investigations Hotline.