article_snippet: The number of complaints we have received about a scam make a scam the largest, most pervasive impersonation scam in the history of we agency.'
article_snippet: a scam is so widespread that investigators believe there is more than one group of perpetrators, including some overseas.
article_snippet: The inspector general's office started warning taxpayers about the scam a year ago, but The inspector general's office has since ballooned.
article_snippet: The inspector general's office started receiving complaints about the scam in 2013.
article_snippet: But the scam has since become more widespread.