Write this down or print it out. Keep it handy, and if Palisades calls you, just read it to them.
Start your recorder. Then read.
"I am now recording this telephone call.
According to someone I spoke with at the Connecticut Department of Banking, you are not licensed to do business as a collection agency in this state. Their office advised me that if you do not correct this error and delete any adverse reporting from my credit reports, then the state will pursue the matter for these violations of law.
What is your name, name of the company you represent, address, and direct line?"
Say nothing else. If they don't answer the question, repeat it for them, once.
Say thank you, and hang up.