You, the obligee, shouldnu2019t need to send any letter. The child support enforcement agency (u2018CSEAu2019) in charge of your case (in Pennsylvania itu2019s the county Domestic Relations Office) will handle enforcement for you. If heu2019s really not paying weu2019ll send him a Notice of Non-Compliance, and if he continues not to pay, a notice to appear in contempt courtu2014he can then explain his failure to pay to the judge.I agree with Heather Morcroft. A defaulting obligor isnu2019t going to pay too much attention to a pro se letter from the obligee, you want the big guns involved. Unless youu2019re privately represented and have the means to hire your own lawyer to do special enforcement proceedings, your best bet is to inquire with the CSEA and let the court handle the matter.Make sure that you prthe agency with any known employment the obligor has. We try to keep track of them through Federal and state-level databases, but sometimes they do slip through the cracks, frustrating wage-attachment.The preceding is assuming that the order has been set already. If you donu2019t have an order, the CSEA should be able to tell you what you need to do for establishment and, in the U.S. at least, prsome u2018limited legal assistanceu2023 in preparing paperwork.