Call came from Port Sanilac, Michigan. Never heard of it. Here's the transcript of the voicemail the automated called left for me: "“The reason of this call is to inform you that IRS is filing lawsuit against you to get more information about this case file please call immediately on our department number 810-201-4408 I repeat 810-201-4408 thank you…”. Gee, I better call that number IMMEDIATELY to see why I'm gonna be sued by the IRS. Help!

Got the same message!   Does IRS call like that or send you papers in mail?

IRS Scam. 810-2021-4408 left this voicemail on 1 May 2017: "Final notice from IRS, Internal Revenue Service. The reason of this call is to inform you that IRS is filing a lawsuit against you. To get more information about this case file, please call immediately on our department number, 810-201-4408. I repeat, 801-201-4408. Thank you."  Also received this same message on 2 May 2017 from 650-263-4998.