Stoddard County Sheriff Carl Hefner wants to warn you about an old scam. Hefner says his office took reports of 30 to 40 calls Thursday from potential victims of an IRS scam. Hefner says some people got a recording; others report talking to an actual person saying he or she owes money to the IRS. The caller then threatens a lawsuit, prosecution and jail time unless the money is paid. Hefner wants to warn the public that the phone calls are not legitimate and are designed to scam the caller. The IRS does not call people in instances like this. If you really owed money, the IRS would contact you by mail. If you get a call like this, Hefner advises you not give out any personal information and immediately hang up. Poplar Bluff police reported a spike in such calls Thursday as well.