Robo calls saying to call this number immediately.  It is the IRS.

They called and told me that this was the final call and that the IRS was going to sue me. I decided to google the number because I thought it was fraudulent. That's not how the IRS contacts anyone and they're not in WA.

Automated message that the IRS will be suing me.

Thank you for posting all these and it is a relief to know I am not alone. When I listened to my voicemail and heard the word "Lawsuit", I panicked. I called them back but got a very heavy-accented Middle Eastern "representative" answer and the background was VERY noisy, like they were outside. I became suspicious and decided to drop the call. I Googled and found all these threads about the scam. Whew!

Recorded female voice (American accent w/o inflection, possibly electronically simulated) states:   "This call is officially a final notice from the IRS, Internal Revenue Services.  The IRS is filing a lawsuit against you, etc...pls call (360)-200-4621". Despite the official sounding voice presentation, it made no sense.  There hadn't been a "pre-final notice".  No name, case number, instructions for the return call, or right to an attorney, etc. were mentioned.  The # is listed as being in Washington State and did not match any IRS #s w/area code 306.  It's clearly not legit and likely to have fraudulent aims.