I currently filed a modification of child support and had a summons served to the other party. It was returned unserved. I used the address I had because it was successful in prior cases before even after I knew the other party did not live there. I recently had to obtain the address from the other party because of this; even after I have been trying for months to get the address. Do I need to request another service to get the other party served again? Is there anyway I can serve the other party myself without any more costs and fees?