Washington Petition to Change a Parenting Plan, Residential Schedule or Custody Order is a legal document used to modify an existing parenting plan, residential schedule or custody order in the state of Washington. This document is filed in the court of Washington by the parent or guardian who wishes to make changes to the existing arrangement. There are three types of Washington Petition to Change a Parenting Plan, Residential Schedule or Custody Order, namely, Petition to Modify Residential Schedule, Petition to Modify Parenting Plan and Petition to Modify Custody or Visitation. Each petition requires the parent to provide information about the proposed changes, the reasons for the change, the current parenting plan, residential schedule or custody order, and any other relevant information. The court will review the petition and decide whether the proposed changes are in the best interest of the child and if necessary, will make changes to the existing arrangement.