Dixied, why isn't his (ex) wife telling him this? It seems to me that she should be the person to pass this information on, and you're right, being in the middle is not a good place for you to be.
That said, it is what it is, and he really should get legal advice before making any decisions or signing anything.
Sending big hugs and lots of prayers because this is going to be a sad time no matter how anyone handles it.
Hugs