Service of Process · Updated October 2026

How to Serve Legal Documents Outside California

A California summons can reach a defendant in another state without that state’s permission. What matters is choosing a method California accepts and getting proof that holds up.

Direct Legal Blog

Service of Process

First published 2015 · Updated October 2026

The complaint is filed in Los Angeles, and the defendant lives in Phoenix. You don’t need an Arizona court’s permission or a local order to serve the summons there. California law lets you use a California method or the method the other state allows, and each one comes with its own proof requirements. A few decisions made before the papers go out decide whether the proof holds up later.

Choosing a method

Your Options for Serving in Another State

Under CCP § 413.10(b), a defendant elsewhere in the United States can be served either as provided in California’s service statutes or as prescribed by the law of the place where the defendant is served. In practice that means:

Personal delivery by a process server in that state (CCP § 415.10).
Substituted service at the defendant’s home or business, with the same requirements as in California, including reasonable diligence and the follow-up mailing (§ 415.20).
Mail with a return receipt, a method only for defendants outside California (§ 415.40).
The other state’s own methods, under its rules for its own courts.

Anyone 18 or older who isn’t a party can serve a California summons (CCP § 414.10). The other state may have its own licensing or registration rules for process servers, so check them when you pick a local server. Keep in mind that service and jurisdiction are separate questions: serving the defendant in another state doesn’t by itself give a California court personal jurisdiction over them (CCP § 410.10).

CCP 415.40

Service by Mail With a Return Receipt

For a defendant outside California, the summons and complaint can be sent by first-class mail, postage prepaid, requiring a return receipt, which in practice means certified mail with a return receipt. Service is complete on the 10th day after mailing (CCP § 415.40).

The catch is the proof. It has to include evidence satisfactory to the court that the papers actually reached the defendant, such as a signed return receipt (CCP § 417.20(a)). A tracking page that says “delivered” isn’t the same thing. If someone else signs, or the receipt comes back unsigned, be ready to show the papers got to the defendant, or serve another way. Mail with a notice and acknowledgment (§ 415.30) also works out of state, but only if the defendant signs and returns it.

Personal service

Using a Process Server in Another State

Personal delivery by a local server is usually the most reliable route, and service is complete when the papers are handed over. One difference to plan for: the presumption that a process server’s return is accurate (Evidence Code § 647) applies only to servers registered in California. An out-of-state server’s proof doesn’t carry it, so ask for a detailed declaration of what happened, especially for any substituted service or refusal.

If the server uses California’s substituted service, give them the California requirements: the attempts first, an adult who is told what the papers are, and the mailing afterward. Servers in other states follow their own rules by habit, and those aren’t always the same.

Corporations and LLCs

Serving a Business Formed in Another State

Check California’s records first. A company formed elsewhere that is registered to do business in California has to keep an agent for service of process here, listed on the Secretary of State’s bizfile Online search, and serving that agent avoids out-of-state service altogether. If it isn’t registered here, serve its agent or an officer in its home state: one of the officers listed in CCP § 416.10, or its registered agent there under that state’s law.

If a registered foreign corporation’s California agent can’t be found, the court can order service through the Secretary of State (Corp. Code § 2111). That takes a declaration of diligence and a court order; an empty office isn’t enough by itself. Our article on serving a registered agent has the details.

CCP 417.20

Proof of Service From Another State

Proof of out-of-state service follows CCP § 417.20, which allows several ways to prove it:

By a California method: proof as prescribed in § 417.10, usually on form POS-010, plus evidence of actual delivery for mail under § 415.40 (§ 417.20(a)).
Under a court order: as the order directs (§ 417.20(b)).
Under the other state’s proof rules: as that state requires in its own courts, plus anything the California court adds (§ 417.20(c)). This option isn’t limited to service made under that state’s law.

Starting January 1, 2027, plan on the new photo requirement for personal delivery and substituted service done the California way in another state. Because § 417.20(a) borrows the proof rules of § 417.10, that proof likely needs the same time-stamped, GPS-tagged photos of the service site, and many out-of-state servers won’t be used to providing them. Ask before you assign the job. Our article on the 2027 service changes covers the photo rules.

Not covered here

Other Countries, Federal Cases, and Witnesses

Outside the United States. Service abroad is under CCP § 413.10(c) and is subject to the Hague Service Convention in countries that have joined it, which often means going through that country’s central authority. Allow months, not days.
Federal cases. Service of a federal summons follows Federal Rule of Civil Procedure 4.
Witnesses and records in other states. A subpoena isn’t a summons; it goes through the other state’s procedure for out-of-state subpoenas. See Interstate Subpoenas and Discovery.

Handoff

What to Send Before the Papers Go Out

the issued summons, the filed complaint, and any other papers that have to go with them
the defendant’s exact name, and for a business, its entity type and the person to be served
every address you have, with notes on what has already been tried
the method you’ve chosen, and any court order
your deadline, remembering the 10 extra days for mail service and 30 days to respond after service is complete

Direct Legal arranges service of process nationwide and returns a signed proof of service, with a declaration describing the service when the method calls for one. Send identifiers like dates of birth through a secure portal, not ordinary email.

Please note

About This Article

This article is general information about California law and court procedure as of October 2026. It is not legal advice, and reading it does not create an attorney-client relationship. Direct Legal Support is a registered process serving and litigation support company, not a law firm. Statutes, court rules, and forms change, so check the current versions and your court’s local rules, and talk with an attorney about your specific matter.