California Code of Civil Procedure section 1011 governs how you deliver motions, notices, discovery, and other papers to a party or their attorney once a lawsuit is already underway. The statute sets a specific order of methods: hand the papers over in person if you can, and if you can’t, follow a cascade of office, residence, and mail alternatives that differs depending on whether you’re serving an attorney or an unrepresented party.1California Legislative Information. California Code CCP – Section 1011
One boundary matters before anything else. CCP 1011 does not cover service of the original summons and complaint that opens a case. Initial service of process is governed by CCP 415.10 through 415.50 and carries stricter requirements, including the use of a sheriff or registered process server in most situations. Everything that follows the initial pleading, though, runs through CCP 1011 and its companion statutes.
Serving an Attorney
When the person who needs the papers is an attorney who has appeared in the case, CCP 1011(a) tells you where to try, in what order, and when.
Start with personal delivery. Handing the papers directly to the attorney is always acceptable, and service is complete the moment the papers change hands.
If you can’t deliver personally, go to the attorney’s office. Leave the papers in an envelope or package clearly labeled with the attorney’s name, either with a receptionist or the person in charge of the office. That labeling requirement is easy to overlook: an unmarked envelope dropped on a reception desk does not satisfy the statute.
If nobody is available at the office to accept the papers, you can leave them in a conspicuous place in the office, but only between 9:00 a.m. and 5:00 p.m. Outside those hours, that option disappears.
If the office is closed entirely, you can try the attorney’s residence. Leave the papers there with someone at least 18 years old. This option is only available if the residence sits in the same county as the office.
When none of those methods works, mail becomes the fallback. Address the envelope to the attorney’s office, or to the residence if the office address isn’t known. If neither address is known, you can deliver the papers to the clerk of the court.
Serving a Party Directly
CCP 1011(b) covers service on a party who is not represented by counsel for this purpose, assuming no other statute specifies a particular method. You can leave the papers at the party’s residence with someone at least 18 years old. Any attempt to serve at a residence must happen between 8:00 a.m. and 8:00 p.m. — a wider window than the office rule for attorneys, but still a hard limit.
If nobody age 18 or older is available during that window, you can switch to mail. If the party’s residence is unknown, you can deliver the papers to the clerk of the court.1California Legislative Information. California Code CCP – Section 1011
When Electronic Service Takes Over
CCP 1011(c) directs you to CCP 1010.6 whenever service is done electronically. In most California civil cases involving represented parties, electronic service is now the default, and the physical-delivery rules in 1011(a) and (b) rarely come into play.
A party represented by an attorney who has appeared in the case is required to accept electronic service of any document that could otherwise be served by mail, express mail, overnight delivery, or fax. The court can also order electronic service on represented parties. Self-represented parties are not required to accept electronic service unless they affirmatively consent, either by filing a notice with the court or by agreeing through the court’s e-filing provider. Filing a document electronically is not, by itself, consent to receive electronic service.2California Legislative Information. California Code CCP – Section 1010.6
Electronic service is complete when the document is transmitted or the notification email is sent. A document served electronically on a court day counts as served that day; one served on a non-court day is deemed served the next court day. Electronic service adds two court days to any statutory response deadline. That extension does not apply to notices of appeal, motions for new trial, or motions to vacate judgment.
Electronic service also has a limit worth remembering: if a document is required to be served by certified or registered mail, you cannot substitute electronic service.3California Legislative Information. California Code of Civil Procedure 1010.6
Service by Mail
Because CCP 1011 falls back to mail when the direct methods aren’t available, the mechanics of mail service in CCP 1013 matter here too.
Under CCP 1013(a), the papers go in a sealed envelope with prepaid postage, deposited at a United States Postal Service facility. Address the envelope to the recipient at the office address they last gave in a court filing, or to the residence if no office address is available. Mail service is complete when you deposit the envelope, not when it arrives.
To account for transit time, the statute extends any response deadline:
- 5 calendar days if both sender and recipient are within California
- 10 calendar days if either is outside California but within the United States
- 20 calendar days if either is outside the United States
Express mail and overnight delivery services carry a shorter two-calendar-day extension. As with electronic service, these extensions do not apply to notices of appeal, motions for new trial, or motions to vacate judgment.4California Legislative Information. California Code CCP – Section 1013
Proof of Service
Delivering the papers is only half of what the court needs from you. Without a properly completed proof of service, the record contains no confirmation that the other side received notice, and your motion or filing can be rejected or continued.
A proof of service is a written declaration, typically signed under penalty of perjury, that identifies the person or attorney served, the address where service occurred, the method of service, the date and time, a description of each document served, and the name and signature of the person who performed the service. California courts provide Judicial Council forms for proof of service by mail, by personal delivery, and electronically. Using the correct form reduces the chance of leaving out a required item. File the proof with the court, and in practice, attach it to or file it alongside the papers themselves.
What Happens When Service Goes Wrong
Courts enforce these rules closely because service protects a basic right: the opportunity to be heard. When service is defective, three kinds of consequences tend to follow.
The most common is procedural. If the opposing party shows they weren’t properly served, the court can continue the hearing, forcing the moving party to re-serve and wait through the notice period again. In some cases the court will strike the filing outright. Most service disputes play out this way, as lost time rather than dramatic sanctions.
Defective service can also undo a judgment. If a default judgment or order was entered while one side lacked proper notice, the affected party can ask the court to set it aside. CCP 473(d) gives courts the power to set aside any void judgment or order on a party’s motion.5California Legislative Information. California Code of Civil Procedure CCP 473
In more serious situations, a court can impose monetary sanctions under CCP 128.5, which allows an order requiring a party or attorney to pay the other side’s reasonable expenses, including attorney’s fees, for actions taken in bad faith or frivolous filings. Deliberately failing to serve, or repeatedly serving improperly to delay the case, falls within that authority.6California Legislative Information. California Code of Civil Procedure 128.5
Defenses to a Service Challenge
Not every defect sinks a filing. The purpose of service is notice, and California courts recognize that distinction.
The most common defense is substantial compliance with actual notice. If you served papers at an attorney’s office but left them with an intern instead of the receptionist, and the attorney received them the same day, a court is unlikely to throw out the service. The question becomes whether the statute’s underlying purpose was met, not whether every detail was perfect. The defense works best for minor deviations, such as leaving papers slightly outside the 9:00 a.m. to 5:00 p.m. window, and it gets much harder to invoke when the defect actually deprived the other side of time to prepare.
Electronic service carries its own trap. A party who previously consented to electronic service can withdraw that consent at any time by filing the appropriate Judicial Council form. After withdrawal, service must revert to one of the other methods allowed under CCP 1011 or 1013. Serving electronically after a formal withdrawal is defective, even if the document was received.2California Legislative Information. California Code CCP – Section 1010.6