Third call today from Manhattan, Olympia, and now El Paso. I've received about eight calls total over the last month, three of which left a message stating I was being sued by the IRS. It's pretty entertaining at this point. I did call back on this one, and an obviously English-as-a-fourth language moron answered, "This is Tom from the IRS." I told him what he could do to his mother.
Caller id came up as "Private"...automated message about having a tax debt. Advised me to return the call within 24 hours, or they would call "the cops".