I also have received these automated calls saying there will be a suit against me.............I jotted down the # the message told me to call.
I went to the IRS website and reported the SCAM ~ there is a form on this site which allows you to fill in the number the message asks you to call AND if you have caller ID, you can fill in the number from which you were called.
I think I've received 2 of these calls ~~~~~~ about 2 months apart. I understand that it is upsetting, I was sick to my stomach after the first call, even though I had no reason to be nervous ~ still off-putting!
It's a SCAM, but I know how you feel!