Bottom line, if he declares bankruptcy or defaults on his payments the companies are not bound by the D settlement and will come after me for the money regardless of any of the circumstances.
Absolutely... I was just googling this same issue the other day for a friend who's D'd but her X is a con man and hasn't adhered to the terms of the decree... and there were many things that came up stating just this. And that in many cases, the S of the person filing banko didn't find out for years b/c they didn't no. So stay on top of your joint stuff, make sure you are contacting the lenders so they know your status and to contact you if STBX goes into default so you are at least aware of what payments he is or isn't making...