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FL Modify 600Mandatory

Summons: Notice about Petition to Change a Parenting Plan, Residential Schedule or Custody Order

Washington · Washington State Courts · Effective September 1, 2026

This form is a notice that someone has asked the court to change an existing parenting plan, residential schedule, or custody order. It tells the person receiving it that they must respond in writing to the court.

Open the official PDFfrom Washington State Courts

Where this fits in a case

Start a case

Stage: Start a case

This form is used when one party files paperwork asking the court to change the current parenting plan, residential schedule, or custody order. The person who receives this form must respond to the court.

Usually filed by the person starting the case.

Common questions

What does this form tell me to do?
It tells you that you must respond in writing to the court for the court to consider your side. You must also serve a copy of your response on the other party and file your original response with the court clerk.
What is the deadline to respond?
Your response must be served on the other party within 20 days of the date you were served this Summons. This is 60 days if you were served outside of Washington State or in a jail, detention, or prison facility.
What if I do not file a response by the deadline?
If you do not file and serve your response by the deadline, the court may approve the requests without hearing your side, which is called a default judgment.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect September 1, 2026.

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