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FL All Family 107Mandatory

Proof of Service by Mail

Washington · Washington State Courts · Effective May 1, 2016

This form is used to prove that certain documents were sent to another person by mail. It requires the person filing it to state that they are not a party to the case and to check boxes showing how service by mail was allowed.

Open the official PDFfrom Washington State Courts

Where this fits in a case

Hearing

Stage: Hearing

This form is used when a person needs to show the court that they mailed documents to another person in a family law case. It is only to be used if the court has given permission for service by mail.

Either party may file.

Common questions

Who should fill out this form?
The form must be filled out by the 'Server,' who is someone who is not a party to the case and must be 18 or older.
When can I use this form?
You can only use this form if the court has signed an Order to Allow Service by Mail for the documents you are sending.
What do I need to file with the court?
The party who received these documents must file the original Proof of Service by Mail with the court clerk.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect May 1, 2016.

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