I had to call several times a couple years ago, when they claimed that we owed an additional $250,000 in taxes, and each time I called, I spoke with different women, all of whom identified themselves as “Mrs. Knox”. I believe they do not give their actual names out when you talk to them on the phone.
My feeling is that if they cannot/won’t identify themselves with their full true names then they are committing a federal crime.
They do this because they think they can get away with it but it is not legal in my opinion.
Tell them you will only communicate with the IRS in writing.
Hmmmm....I should be thinking up my biker name!