What Do I Do if I Receive an Unsolicited IRS-Related Fax?
This IRS does not send unsolicited faxes.If you received a fax it is most likely a scam.
There is a scam that involves a fake Form W8-BEN. If you are a foreign citizen please visit the FATCA home page.
Once you have determined that it is not legitimate, report the incident to TIGTA and to the IRS at phishing@irs.gov (Subject: FAX).