I'm sorry, WGB. We have that, to. For some reason X didn't change addresses or phone numbers to many of his accounts and they still come to the house. I think sometimes that it would be too much reality to change the information over all at once and is easier not to deal with it.
There is a story a friend of mine tells who is a BS where the X there -A WH-was trying to secretly change her off of his life insurance policy, but he neglected to change the contact info. So the calls back to him went to their house, where she lives, and it ended up backfiring on him and becoming a big fight.
Here things come like doctor's apts. or collection calls also and I found myself doing the same thing you did!
Now I don't do much with them and figure it's his job to work on his own finances. And as you say with the blame game, I don't want my name involved!
A person is a person, no matter how small. -Dr. Suess
Perserverance and spirit have done wonders in all ages.