Serving a Corporation in California: Registered Agents and How It Works

You cannot hand a summons to "a corporation" — a corporation is a legal entity, not a person standing in a doorway. So California law designates specific people through whom a corporation can be served. Code of Civil Procedure section 416.10 lists them, and in practice one of them dominates: the agent for service of process. This post explains who that agent is, how commercial registered agents work, what actually happens when a process server arrives at the agent's office, and why every corporate defendant needs its own proof of service.

Who can accept service for a corporation

Under section 416.10, a summons may be served on a corporation by delivering a copy of the summons and complaint:

to the person designated as agent for service of process under the Corporations Code (the designation provisions include sections 202, 1502, 2105, and 2107 — covering domestic corporations' articles and statements of information and foreign corporations' registration filings);
to specified officers: the president, chief executive officer or other head of the corporation, a vice president, a secretary or assistant secretary, a treasurer or assistant treasurer, a controller or chief financial officer, a general manager — or any person the corporation has authorized to receive service;
if the corporation is a bank, also to a cashier or assistant cashier; and
in certain circumstances involving corporations that cannot otherwise be served, through the mechanisms the Corporations Code provides — including, where a court has authorized it, service made through the Secretary of State.

The officer route is real but often impractical: officers travel, gatekeepers deflect, and identifying who actually holds a qualifying title takes work. The agent route exists to remove that friction.

The agent for service of process

Every California corporation designates an agent for service of process in its filings with the California Secretary of State — that is what the Corporations Code provisions cited in section 416.10 are about. The designation is a public record on file with the Secretary of State, which is how a plaintiff's team finds out where a given corporation can be served: look the entity up, and the agent's name and address are part of its record.

The agent can be an individual — a founder, an officer, the company's outside lawyer — or it can be a corporation whose business is exactly this.

Commercial registered agents

Companies like CT Corporation and its competitors act as registered agents for thousands of entities at once. California law provides for this directly: under Corporations Code section 1505, a corporation may act as another entity's agent for service of process if it first files a certificate with the Secretary of State stating the complete street address of its offices in California and the name of each employee at each office who is authorized to accept service. Crucially, the certificate includes the corporate agent's consent that delivery to any listed employee at a listed office constitutes delivery to the agent itself — and section 1505 requires the corporate agent to be authorized to do business in California and in good standing with the Secretary of State.

That structure is why serving a Fortune-500 subsidiary can be easier than serving a sole proprietor: the subsidiary's agent is a staffed office whose employees are on file as authorized to accept, and whose entire function is receiving process.

What actually happens at the agent's office

A process server arrives at the registered agent's listed address with the summons and complaint (and whatever else must be served with them). At a commercial agent's office, an intake employee — one of the people the agent's filed certificate authorizes — accepts the documents and logs them. The server records who accepted, in what capacity, at what address, on what date and time. The agent then forwards the papers to its client corporation. From the plaintiff's perspective, service happened at the moment of delivery to the authorized person — what the agent does with the papers afterward is between the agent and its client.

If personal delivery at the office doesn't pan out, the law also allows substituted service on entity defendants: under Code of Civil Procedure section 415.20, subdivision (a), the papers may be left during usual office hours with the person apparently in charge of the office, followed by a first-class mailing to the same address. We cover that mechanism in detail in Substituted Service in California.

One defendant, one proof of service

Suppose a fictional plaintiff sues Ironvale Logistics, Inc., its subsidiary Ironvale West LLC, and its warehouse landlord Pardee Holdings Corp., and all three happen to use the same commercial registered agent. One trip to the agent's office might physically serve all three — but it is still three services, and it produces three separate proofs of service. The Judicial Council's Proof of Service of Summons (form POS-010) states this on its face: a separate proof of service is required for each party served. Each proof identifies its own party, its own delivery, and — for a corporation — indicates that the "Notice to the Person Served" on the summons was completed on behalf of that entity under section 416.10.

Getting this wrong — one combined proof covering three defendants — creates exactly the kind of record defect that invites a motion to quash. Each defendant's service must stand on its own record.

The practical checklist

Pull the entity's record from the Secretary of State and confirm the current agent and address — agents change, and serving a stale address wastes days.
Confirm the entity's exact legal name, and use it on the documents — "Ironvale" is not a legal name; "Ironvale Logistics, Inc." is.
Serve each defendant entity separately, even at the same office, and get a separate proof for each.
Document who accepted, their stated capacity, the address, the date and the time — that is what the proof of service is built from.

Legal Hub Group's process serving service handles corporate service daily — registered agents, officers, and substituted service where the statute allows it — with GPS-verified attempt records and a proof of service generated for every defendant served. If your matter has a dozen corporate defendants across the state, that is exactly the volume the platform was built for.

This is general information, not legal advice.