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A practitioner guide to serving legal documents in California — from CCP § 415 personal and substituted service to out-of-state subpoena domestication under the Interstate & International Depositions Act at CCP § 2029.100 et seq.
California service of process is governed primarily by the Code of Civil Procedure, §§ 413.10 through 417.40 for summonses and pleadings, and §§ 2029.100 through 2029.900 for foreign subpoenas. The state is the most populous jurisdiction in the country, with 58 counties and distinct local practice in Los Angeles, San Francisco, Orange, and San Diego Superior Courts. California licenses process servers who serve ten or more papers per year under Business & Professions Code § 22350, and its substituted service rule uniquely requires a mandatory follow-up mailing — a detail that trips up out-of-state counsel.
This is practical guidance, not legal advice. California service of process rules are found in Cal. Code Civ. Proc. §§ 413.10–417.40. For service of process nationwide, Served 123 LLC handles California and all 49 other states with qualified servers.
Under CCP § 414.10, service may be made by any person who is at least 18 years old and not a party to the action. California also requires registration under Bus. & Prof. Code § 22350 for anyone who serves ten or more papers per year — registered process servers obtain a bond and register with the county where they reside. Sheriffs, marshals, and constables may also serve process. Registered servers in one county may serve anywhere in the state.
Personal service under CCP § 415.10 is the preferred method. The server hands a copy of the summons and complaint to the person to be served. The return of service identifies the date, time, place, and name of the recipient. For registered servers, California also requires the server's registration number and county on the proof of service.
CCP § 415.20 governs substituted service, and California's rule is distinctive: a server who cannot personally serve the defendant after reasonable diligence may leave the papers at the defendant's dwelling house, usual place of abode, usual place of business, or usual mailing address (other than a U.S. Postal Service post office box) with a competent member of the household or person apparently in charge of at least 18 years old. California then MANDATES a follow-up mailing by first-class mail, postage prepaid, to the same address. Service is deemed complete on the tenth day after the mailing. Skipping the mailing invalidates the service.
CCP § 415.30 authorizes service by mailing a copy of the summons and complaint together with a Notice and Acknowledgment of Receipt (Judicial Council form POS-015) and a stamped, self-addressed return envelope. Service is complete on the date the defendant signs the acknowledgment. If the defendant does not return the acknowledgment within 20 days, the mailing does not constitute service and the plaintiff may seek costs of subsequent service. Ordinary first-class mail without the acknowledgment form is not a valid service method.
CCP § 416.10 authorizes service on a corporation by delivery to the person designated as agent for service of process, a president, CEO, other head of the entity, vice president, secretary or assistant secretary, treasurer or assistant treasurer, general manager, or person authorized by the entity to receive service. For California-registered entities, the Secretary of State's bizfile portal (bizfileonline.sos.ca.gov) identifies the agent and address. CCP § 416.40 and § 416.50 cover LLCs, partnerships, and associations. If the agent cannot be found after reasonable diligence, the Secretary of State may be served as substitute under Corp. Code § 1702.
CCP § 413.10(b) authorizes service outside California in the manner provided by California law or in the manner provided by the law of the place where the person is served. CCP § 415.40 specifically permits service on out-of-state defendants by first-class mail, postage prepaid, requiring a return receipt — service is deemed complete on the tenth day after mailing. Service in a foreign country proceeds under CCP § 413.10(c) and the Hague Service Convention.
CCP § 415.50 permits service by publication when a defendant's whereabouts cannot be ascertained after reasonable diligence. The plaintiff must apply to the court for an order authorizing publication. Service runs once a week for four successive weeks in a newspaper of general circulation most likely to give actual notice, and a copy of the summons and complaint must be mailed to the defendant's last known address if known. Service by publication is complete on the 28th day after the first day of publication.
California adopted the UIDDA in substance as the Interstate & International Depositions and Discovery Act at CCP § 2029.100 et seq., effective January 1, 2010. California's version notably extends to international subpoenas, not only sister-state subpoenas. To domesticate a foreign subpoena, counsel submits the foreign subpoena to the clerk of the superior court in the California county where discovery is sought, together with a California subpoena that incorporates the foreign commands. The California clerk issues the domesticated subpoena without requiring a motion or appearance by local counsel. Service of the California subpoena must comply with California service rules — commonly via a registered California process server.
CCP § 583.210 requires the plaintiff to serve the summons and complaint within three years of filing the action — a far longer window than most states' 90- or 120-day rules. If service is not completed within three years, the action is subject to mandatory dismissal under § 583.250 unless the defendant has appeared or an exception applies. Practitioners should nevertheless serve promptly — some counties enforce earlier local case-management deadlines.
The proof of service in California is filed on a Judicial Council form — POS-010 for summonses served personally or by substituted service, POS-015 for Notice and Acknowledgment of Receipt, and POS-020 for service by mail or publication. Registered servers must include their registration number and county on the proof. A defective proof of service can be amended, but the underlying service must be valid.
Practitioners routinely handle California service for registered-agent service on Delaware and California entities, UIDDA domestication of out-of-state subpoenas through the Los Angeles and San Francisco Superior Courts, unlawful-detainer service for evictions in municipal courts, and hard-to-find individual service across the state's dense urban and sprawling rural geography.
No. California, like every other state, prohibits parties from serving their own process. The server must be an adult non-party or an authorized officer/licensed server per California rules.
California Code of Civil Procedure § 583.210 requires service within three years of filing the complaint — a significantly longer window than most states. If service is not completed within that period, the case is subject to mandatory dismissal under § 583.250 unless an exception applies. Many counties enforce earlier local case-management deadlines, so serve promptly.
Ordinary first-class mail alone is not a valid service method. CCP § 415.30 authorizes service by mail only if accompanied by a Notice and Acknowledgment of Receipt (form POS-015) that the defendant signs and returns. CCP § 415.40 authorizes first-class mail with return receipt for out-of-state defendants. And substituted service under § 415.20 requires a mandatory first-class mailing after leaving papers at the defendant's residence or business.
CCP § 416.10 authorizes service on a corporation's designated agent, president, CEO, vice president, secretary, treasurer, general manager, or any person authorized to receive service. The California Secretary of State's bizfile portal identifies the agent for registered entities. If the agent cannot be located after diligent inquiry, the Secretary of State can be served as substitute agent under Corporations Code § 1702.
California follows the majority refused-acceptance rule. The server may place the papers in the defendant's immediate presence after identifying the nature of the documents. Service is valid despite refusal.
CCP § 413.10(b) authorizes service outside California either by California methods or by the law of the state where service is made. CCP § 415.40 permits service by first-class mail, postage prepaid, return receipt requested, on defendants outside California — service is complete on the tenth day after mailing.
Start with a skip trace, then move for service by publication on a court order supported by an affidavit documenting diligent inquiry. four successive weeks in a newspaper of general circulation in the county where the action is pending.
