The Washington Summons Notice About Petition to Modify Child Support Order is a legal document issued by the court that notifies the other party of a child support case that a petition has been filed to modify the existing child support order. The notice includes the name of the petitioner, the case number, the date of the petition, and a summons to appear in court. The Washington Summons Notice also explains the legal consequences of not responding to the petition. There are two types of Washington Summons Notice About Petition to Modify Child Support Order: an initial summons notice and a hearing summons notice. The initial summons notice is issued when the original petition is filed, while the hearing summons notice is issued when the court has set a date for a hearing on the petition. Both the initial and hearing summons notices include the date, time, and location of the court hearing.