In addition to the previous quesdtions about how whether there WAS an order, whether an effort was made to collect, and how long ago the order occured, regarding the question of LIENING real estate:
Is he in title as owner of any real esate?
AS to being able to collect, in addition to the legal issues of laches, and SOL, there is the collectablity issue:
Does he have assets? For all you know he may have been divorced thrice since mom and all the Ex's have most his money!