Alameda County Department of Child Support Services (DCSS) will use legal processes to modify an order for child and or medical support. Forms. Apply for Services.Parents tell the court about their agreement to make an initial (the first) order for child support or modify (change) existing orders. I am requesting a modification of child support based upon the following change of circumstance since the last order for child support was entered: 1. File a Request for Order: Use Form FL300 to file a Request for Order with the court that issued the original custody order. If you decide to file for a modification yourself or DOR is not involved — You'll need to file the Complaint for Modification (CJD 104) form. File a Request for Order: Use Form FL300 to file a Request for Order with the court that issued the original custody order. Additionally, the parent seeking the change must complete Form FL 300.