Total scam. Originates in either India or Pakistan.
See: http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... ve-Telephone-Sc
Report them:
http://www.treasury.gov/tigta/contact_report_scam_ok.shtml
Report the Calls to the real IRS here:
•report the incident to the Treasury Inspector General for Tax Administration at 800-366-4484.
•You can also file a complaint with the Federal Trade Commission at FTC.gov. Add "IRS Telephone Scam" to the comments in your complaint.
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Do consider maybe getting a call blocking device or phone.. You can google them and many are around $50.00 or so.If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.