Civil
POS-030: Proof of Service by First-Class Mail—Civil
Current as of July 21, 2026 · tracked for revisionsFillable PDFJudicial Council of California
This form is used to document that you mailed court papers to other people involved in your case, proving you followed the court's rules about notifying them. Anyone involved in a California court case who needs to send official documents to other parties—such as plaintiffs, defendants, or their lawyers—would use this form to show the court that proper notice was given.
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Step-by-step guideProof of Service →Serving the other side isn't enough — the court needs a filed proof. Match your service method to the right POS form and file it before your hearing.Forms that go with POS-030
CM-010AttachmentCivil Case Cover SheetThe Civil Case Cover Sheet is typically filed at the outset of a civil case and requires an accompanying proof of service, making POS-030 a natural attachment for confirming service of initial filings.›UD-105AttachmentAnswer — Unlawful DetainerThe Answer to Unlawful Detainer is a responsive pleading that must be served on the opposing party by mail, requiring a completed POS-030 to be filed as proof that service was completed.›POS-010Often filed with itProof of Service of SummonsProof of Service of Summons is commonly filed alongside POS-030 to confirm that the summons and complaint were properly served on the defendant, often by mail in eligible cases.›