My children's father is on SSI and does not pay his court ordered child support. I also know that he has been working under the table for some time now (and is earning more than me) and still will not pay his child support. He is 15 months behind on payments. I had a child support case with my state's DHS but they closed it stating that they can't force a person on SSI to pay. Is there any way I can collect child support from someone on SSI?