“The fraudulent calls came suddenly and frequently while the scam was active from 2012 to 2016, according to court documents. A person posing as an Internal Revenue Service or immigration official was on the phone, threatening arrest, deportation or other penalties if the victims did not immediately pay their debts with prepaid cards or wire transfers.”
Read more: https://www.nytimes.com/2018/07/23/business/irs-phone-scams-jeff-sessions.html