Mom and dad have joint custody with mom having residential.  Back when mom moved to a new town and enrolled their child into a new school they refused to speak to my husband.  We had to get our attorney involved and fax the divorce papers just for them to speak to him and be put on as emergency contact since mom works out of state a lot.  Mom never paid the school fees for last year and we have now received a collections notice for those fees.  Mom is now filing bankruptcy and is not responsible for these bills so they say my husband is the only one responsible for them.  That is what he pays his child support for.  They go on trips all the time, she  buys him $200 shoes, $100 sweatshirt, and more rather expensive things.  But then again we are talking about the same mom that told son child support was paid for only food!  Any advice on what we can do about this?  Oh and when we called the school to advice them mom should be responsible since she signed the paperwork and everything they advised this years fees haven't been paid either.  So I see it as he pays his good amount of child support, they can spend money on unneeded things, go on multiple trips... and she can file bankruptcy and stuff that should be paid by child support is now my husbands responsibility?