Forms may be obtained from the Self-Help Center and click Simplified modification of support order. Parents tell the court about their agreement to make an initial (the first) order for child support or modify (change) existing orders.Either parent or the child's legal guardian can ask for a change (called a "modification") to increase or decrease the amount of court-ordered child support. Change my court order. You can seek a modification of the court order for child support, spousal support, child custody, and visitation as long as specific requirements are met. You file a Request for Order (FL300) for Modification of Child Support in the court and case in which child support was ordered. Questions in San Jose or Santa Clara County about California laws on child support or custody modifications? If child support payments are part of your divorce proceedings, our family lawyers can help you understand the sensitive details. Call (408) 244-4570 today. Making a request only requires you to submit one form: Form FL-300, the Request For Order.