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FL-686Mandatory

Proof of Service by Mail (Governmental)

California · Judicial Council of California · Effective January 1, 2020

This form is used to prove to the court that certain court papers were sent by mail to the local child support agency and the other person involved in the case. It requires the person filing it to state that they are over 18, not a party to the case, and live or work in the county where the mailing happened.

The court describes it as: Use this form to prove to the court that you gave the local child support agency and the other side court papers by mail.

Open the official PDFfrom Judicial Council of California

Where this fits in a case

Hearing

Stage: Hearing

This form is used when someone needs to show the court that they mailed required documents to the child support agency and the other parent in a custody or support case.

Either party may file.

Official instructions

How-to guides published by the court for this form.

Common questions

Who can fill out this form?
The person filling out this form must be at least 18 years old, not a party to the case, and must live or work in the county where the mailing took place.
What does this form prove?
It proves that the required court papers were sent by mail to the local child support agency and the other side.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect January 1, 2020.

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