What to Do When You Can't Collect When all else fails, go to a Child Support Collection Agency.  They work on a performance basis and only get paid when they collect for you.  The negative with this strategy is that they will take a portion of the money they collect.  But since they can also collect interest on the amount due, this usually covers most of their fees.  We have evaluated the top three collection agencies and they are www.nationalchildsupport.com, www.childsupport.com and www.supportkids.com.  All three have a good reputation in the market and usually get results.  In evaluating the service levels, www.childsupport.com and www.supportkids.com had a few complaints.  www.nationalchildsupport.com had no complaints that we could verify, so they would be the company we recommend.  To get a free evaluation of your case, fill out their form below.