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Proof of service declaration generator

A preliminary notice only counts if you can prove you served it. Enter who you served, how, and when, and get a California proof of service declaration (Civil Code §§8100–8118) ready to print and sign, and keep with your notice.

Proof of service declaration
PROOF OF SERVICE (California Civil Code §§ 8100–8118) I, [Declarant name], declare: I am over the age of 18 years and not a party to the project or claim referenced below. On [date of service], I served a true copy of the California 20-day Preliminary Notice on the following party: [recipient name] [recipient address] by certified mail, return receipt requested, postage prepaid, addressed as shown above. Service by mail is complete at the time of deposit with the United States Postal Service. I declare under penalty of perjury under the laws of the State of California that the foregoing is true and correct. Executed on July 23, 2026, at [city, state]. _______________________________ [Declarant name]
Need to send the notice too? File one with mailing included

Not legal advice. This tool produces a self-prepared declaration based on the general requirements of California Civil Code §§8100–8118. It does not verify your facts or deadlines and is not a substitute for an attorney. Keep your certified mail receipt and tracking record with the signed declaration.

Why proof of service decides whether your notice counts

Serving a California preliminary notice is only half the job. If a payment dispute escalates and you move to record a mechanics lien, the first thing scrutinized is whether the notice was served correctly and on time. Your proof of service is the evidence. A clean, signed declaration, paired with your certified mail receipt and tracking, is what turns “I sent it” into something you can stand on.

Service by mail is effective on the date of deposit

Under California's construction notice rules, service by first-class certified or registered mail is complete when you deposit the envelope with the U.S. Postal Service, not when it's delivered. That deposit date is what counts against your 20-day deadline, so the declaration records the date you mailed it. Delivery confirmation is useful supporting proof, but it is not what makes service effective.

What to keep together

Store the signed declaration, a copy of the notice you served, the USPS certified mail receipt, and the tracking history as one package. If you served more than one party, the owner, the direct contractor, and the construction lender, prepare a declaration for each. Keeping the set complete now is far easier than reconstructing it months later under deadline pressure.

Haven't served the notice yet?

Confirm your deadline with the 20-day deadline calculator, then file a preliminary notice with certified mailing included, and the proof of service is generated and stored with it automatically.

Frequently asked questions

What is a proof of service for a California preliminary notice?

It is a signed declaration stating who served the notice, on whom, when, and how. California Civil Code §§8100–8118 govern how preliminary notices and related documents are served and how that service is proven. If you ever need to record a mechanics lien or enforce your rights, the proof of service is the evidence that you served the notice correctly and on time.

When is service by mail effective in California?

For service by first-class certified or registered mail with prepaid postage, service is complete at the time the document is deposited with the United States Postal Service, not when it is delivered. That deposit date is what counts against your 20-day deadline, which is why the declaration records the date of mailing.

Do I need the certified mail receipt and tracking?

Keep them. The declaration is your sworn statement of service; the USPS certified mail receipt, the tracking record, and any return receipt are the supporting documentation. Store them together with a copy of the notice so the full proof of service package is ready if you need it.

Is this declaration legal advice?

No. This tool produces a self-prepared declaration based on the general requirements of California Civil Code §§8100–8118. It is a document-preparation aid, not an attorney, and it does not verify your facts or your deadlines. For a contested claim or a high-value project, have the document and your service reviewed by a California construction attorney.