The Washington Petition to Modify Child Support Order is a legal document filed in Washington State that is used to request a change to the existing child support order. The petition can be used to either increase or decrease the amount of child support or to terminate the existing order. It is important to note that the petition must be filed in the county where the original order was issued. The Washington Petition to Modify Child Support Order can be categorized into two types: 1) a petition to increase support, or 2) a petition to decrease or terminate support. In either case, the petition must include personal information about the petitioner, such as their name, address, and contact information, as well as information about the other parent. It must also include information about the existing child support order, such as the amount and date it was issued, and the reasons for the requested modification.