Claimed they are the IRS and they have a lawsuit against me. I need to handle it immediately. The threatening messages started 3 years ago. None for about a year. They 4 times this month ( Jan 2018). Twice yesterday.. The IRS has sent me refunds every year (proceeding the initial call years ago) so I'm sure I don't owe taxes none the less owe enough to warrant a lawsuit when I've never even been audited.