Service of process in California is the formal delivery of a summons and complaint to the person or business being sued, and the rules live in the California Code of Civil Procedure. The plaintiff cannot do it themselves. Someone else has to hand over the papers using one of the methods the statute recognizes, and the plaintiff then files a proof of service with the court. Get it right and the defendant has 30 days to respond. Get it wrong and the case can stall for months or unravel entirely.
Who Can Deliver the Papers
Any person who is at least 18 years old and is not a party to the lawsuit can serve a summons and complaint.1California Legislative Information. California Code of Civil Procedure 414.10 That includes a friend, neighbor, coworker, or adult family member who isn’t named in the case. It does not include the plaintiff.
Most plaintiffs skip the favor and hire a professional. Anyone who serves more than ten sets of legal papers per year in California must register with the county clerk, pass a background check, and post a $2,000 surety bond or cash deposit.2Justia. California Code Business and Professions Code 22350-22360 Registered servers know the procedural requirements, keep detailed logs, and can navigate defendants who don’t want to be found. County sheriff and marshal offices will also serve papers for a fee, which is useful when the defendant is likely to be hostile or when a court order such as a restraining order is involved.
The Methods California Recognizes
California law ranks methods of service roughly by reliability. Personal delivery is the gold standard. Substituted service and mail are available when personal delivery fails or when both sides cooperate. Publication is a last resort. The method you use determines what proof you have to file and how fast the case can move.
Personal Delivery
Personal service means physically handing the summons and complaint to the person being sued.3Justia. 2007 California Code of Civil Procedure Article 3 Manner of Service of Summons The defendant does not have to accept the papers or sign anything. If they refuse to take them, the server can set them down nearby while stating what they are, and that counts. This method removes any later argument about whether the defendant actually received notice, which is why courts prefer it for initial filings, subpoenas, and restraining orders.
Substituted Service
When personal delivery fails after real effort, the server can leave the papers with a competent adult at the defendant’s home, workplace, or usual mailing address, as long as that person is told what the documents are. The server then mails a copy to the defendant at the same address by first-class mail, Priority Mail with tracking, or certified mail with return receipt requested.4California Legislative Information. California Code of Civil Procedure CCP 415.20
“Reasonable diligence” means at least three good-faith attempts on three different days at three different times.4California Legislative Information. California Code of Civil Procedure CCP 415.20 If the defendant challenges service later, the plaintiff has to show those attempts were genuine, not three drive-bys at noon on three consecutive days. Varying time of day and day of week builds a much stronger record. Most service disputes happen here, so a detailed attempt log is worth the effort.
Service by Mail
The plaintiff can mail the summons and complaint along with a Notice and Acknowledgment of Receipt. For mail service to count, the defendant must sign the acknowledgment and return it within 20 days.3Justia. 2007 California Code of Civil Procedure Article 3 Manner of Service of Summons If the defendant ignores the form, the plaintiff has to fall back on personal or substituted service, and can ask the court to make the defendant pay the added expense. Mail service works best when the defendant has a lawyer and both sides are cooperating. Otherwise the defendant has an easy veto: not returning the form.
Service by Publication
When the defendant truly cannot be found despite thorough searching, the court can authorize service by publishing the summons in a newspaper of general circulation in the area where the defendant was last known to live. The plaintiff has to convince the court through a sworn declaration that no other method would work.3Justia. 2007 California Code of Civil Procedure Article 3 Manner of Service of Summons That means documented searches of public records, attempts to reach known associates, and checks at last known addresses. Once approved, the summons must appear in the newspaper once a week for four consecutive weeks. Courts grant this sparingly because it is the least likely method to actually reach the defendant.
Electronic Service
Documents can be delivered electronically under CCP 1010.6, but generally only when the recipient has agreed to accept electronic service in the particular case.5California Legislative Information. Section 1010.6 2016 California Code The sender needs to use a format the recipient can open and save, and must keep proof of transmission. Courts handling complex or consolidated cases can order all parties to file and serve electronically as long as it wouldn’t create undue hardship. Electronic service generally applies to documents exchanged after the lawsuit has started, not to the initial summons and complaint, unless the defendant explicitly agrees otherwise.
Serving a Business Instead of a Person
Suing a company follows different rules, and handing papers to a receptionist or a random employee can invalidate service. For a corporation, the summons and complaint can go to the company’s designated agent for service of process, its president, CEO, vice president, secretary, assistant secretary, treasurer, assistant treasurer, controller, chief financial officer, general manager, or anyone the corporation has formally authorized to accept service.6California Legislative Information. California Code of Civil Procedure 416.10 For banks, a cashier or assistant cashier also qualifies.
Every corporation registered in California must keep a designated agent for service of process on file with the Secretary of State, and that name and address are public record. The Secretary of State’s business search database is the easiest starting point. Partnerships and other unincorporated associations follow a similar pattern: deliver to a general partner, general manager, or designated agent. Government agencies have their own rules, usually requiring service on a specific official or office.
Deadlines You Cannot Miss
The plaintiff has up to three years from the date the complaint is filed to serve the defendant. Miss that window and the court must dismiss the case. Three years sounds generous, but a defendant who relocates or actively hides can eat through it quickly.
Once service is complete, the defendant has 30 days to file a written response, and the summons itself must state that. If the defendant does nothing, the plaintiff can ask the court to enter a default, which can lead to a judgment for the full amount demanded, and from there to wage garnishment or seizure of property.7California Legislative Information. California Code of Civil Procedure 412.20 Filing a motion to quash extends the response time, so a defendant who believes service was defective should act rather than let the 30 days run out.
Some case types run faster. Unlawful detainer (eviction) cases give the defendant only five days to respond after service. Family law cases follow the 30-day rule but add automatic temporary restraining orders that take effect the moment the petition and summons are personally served on the respondent.8California Legislative Information. California Family Code 233
Filing the Proof of Service
Serving the papers is only half the job. Until the plaintiff files a proof of service with the court, there is no official record that the defendant was notified, and the case cannot move forward. CCP 417.10 requires the person who performed service to sign an affidavit stating when, where, and how the documents were delivered, and the name of the person who received them.9California Legislative Information. California Code of Civil Procedure CCP Section 417.10
The specific form depends on the method. Personal and substituted service use a Proof of Service of Summons form describing the delivery and, for substituted service, confirming the follow-up mailing. Mail service requires the signed acknowledgment of receipt from the defendant. Service by publication requires an affidavit from the newspaper confirming the summons ran for the required four consecutive weeks. Missing details or filing the wrong form gives the defendant grounds to challenge service.
What Service Costs
Cost depends on who does the work. Having a friend or family member hand-deliver the papers costs nothing, though inexperienced servers are more likely to make procedural errors that create problems later.
County sheriff and marshal offices charge a set civil process fee that varies by county. Professional private process servers typically charge between $40 and $100 for a standard local delivery, with rush or same-day service adding $25 to $50. Additional attempts beyond the first usually cost $20 to $50 each, and remote locations may add a travel surcharge. Service by publication is the most expensive method because it combines court filing fees, newspaper publication costs, and often attorney time to prepare the motion. Total costs can run several hundred dollars.
What Happens When Service Is Done Wrong
Defective service is not a technicality. A defendant who was not properly served can file a motion to quash the summons, arguing the court never obtained personal jurisdiction over them. California courts treat the motion to quash as a narrow procedural tool specifically designed to challenge defective service, and they grant it when the statutory requirements were not met.10California Supreme Court. Stancil v Superior Court A successful motion forces the plaintiff to start over.
The bigger risk shows up after a default judgment. A defendant who was never properly served can move to set aside that judgment by showing service was unlawful. Under CCP 473, courts have broad discretion to vacate defaults caused by mistake or excusable neglect. Starting January 1, 2027, CCP 473.2 creates a more specific remedy: a defendant who was not served in compliance with the law can file a motion to vacate the default, and the plaintiff then bears the burden of proving by a preponderance of the evidence that service was actually lawful.11California Legislative Information. California Code of Civil Procedure 473.2 That shift matters, because under current law the defendant challenging a default typically carries the heavier load.
Deliberately mishandling service carries its own risks. Courts take fraudulent proofs of service seriously, and a server who files a false declaration swearing to a delivery that never happened faces potential perjury charges. Cutting corners almost always makes the case take longer.
Out-of-State and International Defendants
California’s long-arm statute lets California courts exercise jurisdiction over any defendant, anywhere, on any basis that does not violate the U.S. or California constitutions.12California Legislative Information. California Code of Civil Procedure 410.10 If an out-of-state defendant did something in California, or directed conduct at California that caused harm here, a California court can likely hear the case. Delivering the papers is the harder part.
For defendants in other states, California generally permits any method of service that would be valid under California’s own rules or under the law of the state where service is made. A proof of service still has to be filed with the California court, and courts often scrutinize out-of-state service more closely.
International service adds another layer. When the defendant is in a country that has signed the Hague Service Convention, service must go through that country’s designated Central Authority using mandatory forms prescribed by the treaty. The Central Authority arranges for local service under its own rules and returns a certificate confirming delivery. The process can take months. For defendants in countries that have not joined the Hague Convention, service must follow the law of the foreign country or any applicable treaty. Either route usually calls for an attorney experienced in cross-border litigation.