You are correct - in some states, like Michigan, only one party has to know the call is being recorded - that would be you. What the heck. When I get good and mad I tell them I'm recording the call.
I have no tolerance for collection agencies acting on behalf of health care. The last time I received a call from a collection agency, I gave them this line: "The FPC required me to advise you that you have called a billable number" (they ask what do I mean". Then I explain to them that the number they dialed has been forwarded to a billable 800 number. The first minute is 50.95, each additional minute is 10.95 and will be billed directly to their main number. Do you want to continue the call. When one agency did - I let them talk and talk and talk. Then I gave them their total verbally and mailed them an invoice the next day. I mailed them a 30, 60 and 90 day past due invoice. Once I reached 120 days past due, I sent them a letter advising them that the matter was being turned over to a collections agency. The invoice that I sent them simply stated "for telecommunications services rendered".