The court has placed the most commonly used forms on line as a resource. Please be advised that the forms detailed below are intended to be a guide.The official Web site of the Essex County Clerk, your guide to the wide range of services available to you as residents of Essex County. What forms do I need? If you live in the USA, you can go to the County Child Support office and start court proceedings there. CHILD CUSTODY should be ordered as set forth in the proposed Judgment (form FL-250). You need to get the amount of back child support reduced to a judgment.