Glad to hear you were able to make use of that letter and obtain some peace as a result of putting it (or something like it) to work.
You might still receive the occasional letter in the mail demanding payment, etc., but from my experience those can be ignored. I still have one agency (I believe) calling me from time to time, I don't have a clue which one, because whenever they call I tend to answer with "Juan's Pizzaria and Pet Store", and well, nobody bothers to ask for me. ;-)
O.C.