Called my cell.

Cold called my phone and said they were with the IRS.  They said they send out registered mail, but when I requested another copy be sent out they said they couldn't and that it was just a "courtesy call" and that there is a warrant out for my arrest, BUT they can miraculously take care of it over the phone if I PAY NOW...

OMG same thing happened to me. They gave me a fake case number and couldnt explain in details any of the violations she claimed i had done. When i wanted to get very specific, she hung up on  me.

I just got a call from 240-479-3968 saying I am acused of tax evasion and I will be arrested in a couple of hours. I started laughing and asked the caller ( which appeared to be of Indian origin) what does he want in fact. If I wasn't waiting for a job recruiter to call I would not have even answered.

When I hear things like this, I tell them to wait, while I conference my lawyer in on the other line.  They usually panic and hang up!