The Washington Notice of Hearing on Petition to Modify Child Support Order is a document that is used to notify the parties involved in a child support case of a hearing to modify the existing order. This notice is issued by the court and includes the date and time of the hearing, as well as the address of the court. There are two types of Washington Notice of Hearing on Petition to Modify Child Support Order: 1) Notice of Motion to Modify Child Support and 2) Notice of Show Cause Hearing. The Notice of Motion to Modify Child Support is used when one of the parties is requesting a change to the current child support order. The Notice of Show Cause Hearing is used when one of the parties is asking the court to enforce the current order or take other action. Both notices provide information about the hearing and the parties' rights to present evidence and make arguments.