1 You don't have a court order to establish child support payments, and you want one. 2  You have a registry-only (RO) case with the Attorney General, but you want other services, such as enforcement or modification, that would change your case into a full-service (FS) case.eginning September 1, 2011, custodial parents will pay a $3 monthly fee in cases that receive registry-only payment processing and record-keeping services through the State Disbursement Unit (SDU) for each month in which a child support payment of more than $3 is received.