How Many Attempts Before Substituted Service in California?

Ask three process servers how many attempts the law requires before substituted service, and you will hear "three" three times, with total confidence.

The confidence is understandable, because three is a good answer. It is just not what current California law says, and the reason the number floats around with such authority is that it appears in a statute most people have not read closely enough to notice the operative date. Getting this wrong in a declaration of diligence is the kind of error that sits unnoticed in a court file until a default judgment needs defending, which is the worst possible moment to discover it.

Current law: a standard, not a number

Code of Civil Procedure section 415.20(b) allows substituted service on an individual only when the summons "cannot with reasonable diligence" be personally delivered. The statute does not define reasonable diligence, so the courts have. The touchstone case is Bein v. Brechtel-Jochim Group, Inc. (1992) 6 Cal.App.4th 1387, and the standard that emerges from it and the cases around it runs like this: ordinarily, two or three good-faith attempts at a proper address, made on different days and at different times, will satisfy reasonable diligence. Ordinarily. It is a case-by-case evaluation, and a court reviewing your declaration is weighing the whole picture: whether the address was right, whether the attempts were spread out or stacked, and whether they look like a genuine effort to find someone or a box-checking exercise performed on the way to the mailbox.

That has a practical consequence for how attempts should be made. Three visits at 2pm on three consecutive weekdays is three attempts, and it is also a pattern a judge can read as designed to miss a person with a day job. Morning, evening, and weekend attempts tell the opposite story, which is one reason Sunday service being fully lawful in California matters more than trivia. The declaration is what sells the diligence; the count is just its skeleton.

Where the "three attempts" rule actually lives

In 2025 the Legislature passed AB747, the SPARE Act, which rewrites section 415.20 to include exactly the bright line everyone already believes in: attempts on three or more occasions, over three or more days, at three or more different times of day. It also adds photo-documentation requirements to the proof of service. And all of it is operative on January 1, 2027, not today. Until then, the current text of the statute controls, and the current standard is Bein, not 3/3/3.

The distinction cuts both ways, and both edges matter. A declaration filed today that cites the three-attempt rule as the governing standard is citing a statute that is not yet operative. And a server who treats three attempts as a guaranteed green light can still fall short of Bein if the three attempts were perfunctory, while a server with two thorough, well-documented, well-varied attempts may already be there. A number is easy to memorize; the standard is what holds up.

The distinction almost everyone misses: businesses need zero

The attempts question only applies to individuals. Substituted service at a business under section 415.20(a), leaving the papers with the person apparently in charge during usual office hours and mailing a copy, requires no prior personal-service attempts at all. No diligence showing, no attempt log, no declaration. Serving a corporation, an LLC, or an individual at his or her office runs on entirely different mechanics than serving an individual at home, and conflating the two produces both wasted attempts (chasing a registered agent for personal delivery that was never required) and defective serves (one knock on a front door, then straight to sub-service on a person the statute treats as an individual).

One more clock: sub-service is not complete at the door

Substituted service is deemed complete on the 10th day after the follow-up copy is mailed. On a file governed by the 60-day serve-and-file deadline, that means the diligence attempts, the sub-serve, and the mailing all have to land early enough for the 10-day period to run inside the window. Diligence takes days by definition; it cannot start on day 55.

How Angel City Legal handles the two regimes

My standard is three attempts, varied across days and time bands, each one photo-documented with GPS and timestamp, with the mailing executed the same day the sub-serve is made. That satisfies Bein comfortably today, and it already meets the 2027 statute on the day it becomes law, so nothing about my attempt logs or proofs needs to change when the calendar turns. What I will not do is write "AB747 requires" into a declaration before January 1, 2027, because a declaration's job is to be correct, and the difference between the ACL field standard and the currently operative law belongs in the server's head, not blurred together in a court filing.

So the answer to the question is the lawyerly one: today, as many attempts as reasonable diligence requires on your facts, which the case law usually pegs at two or three done properly; in 2027, three on three days at three times as a statutory floor. The servers answering "three" are not wrong about what to do. They are wrong about why, and in a diligence declaration, the why is the part under oath.

Angel City Legal is a registered process server, not a law firm. This article describes California service procedure for general information; it is not legal advice about your case.