Your Noncompete Is Void. What Actually Protects Your Customer List in California.

Your top salesperson resigns on a Friday. By Wednesday, three of your largest accounts have called to say they are moving their business, and all three mention the same new company. Your first instinct is to pull the employment agreement and point at the noncompete clause.

In California that clause is almost certainly void, and since 2024 waving it at a former employee can cost you money rather than make you any. What actually protects you is not the contract you thought you had. It is trade secret law, and whether it protects you was largely decided long before the resignation letter arrived.

California does not enforce noncompetes, and 2024 made that stricter

Business and Professions Code section 16600 voids every contract by which anyone is restrained from engaging in a lawful profession, trade, or business, except within narrow statutory exceptions for the sale of a business or the dissolution of a partnership or limited liability company.

Employers spent years arguing that a modest restriction should survive because it did not bar the employee from the whole industry. In Edwards v. Arthur Andersen LLP (2008) 44 Cal.4th 937, the California Supreme Court rejected that "narrow restraint" theory outright, holding that noncompetition agreements are invalid under section 16600 even if narrowly drawn, unless they fit one of the statutory exceptions.

Two statutes effective January 1, 2024 went further:

1. Section 16600.5, added by SB 699. A contract void under the chapter is unenforceable regardless of where and when it was signed, which closes the out of state agreement workaround. Entering into such a contract, or attempting to enforce one, is a civil violation. Employees, former employees, and even prospective employees get a private right of action for injunctive relief, damages, and attorney fees.
2. Section 16600.1, added by AB 1076. Noncompetes are expressly unlawful in the employment context, and employers had to send individualized written notice, by both mail and email, to current and former employees employed after January 1, 2022 whose agreements contained one, telling them the clause is void. That notice was due by February 14, 2024.

Read those together and the practical lesson is uncomfortable. The noncompete in your handbook is not merely unenforceable. It is a liability, and the demand letter built on it hands the other side a fee shifting claim. Attorney fees under section 16600.5 run one direction only, toward the employee.

What is left is trade secret law

The California Uniform Trade Secrets Act, Civil Code section 3426 and following, does something section 16600 forbids anyone from doing by contract. It does not restrain where a person may work. It restrains what they may take and use.

That difference is the whole game. You cannot stop a salesperson from selling to your industry. You can stop them from doing it with your files.

Is your customer list actually a trade secret?

Two things must be true, not one. The information must derive independent economic value from not being generally known to others who could profit from it, and the owner must have made reasonable efforts to keep it secret.

Morlife, Inc. v. Perry (1997) 56 Cal.App.4th 1514 is still the case worth knowing. Two employees of a commercial roof repair company resigned, joined a competitor, and took the customer information with them. The court held the customer list was a trade secret, and the reasoning is more useful than the result.

On value: the list was not a roster of names. It had been assembled through telemarketing, sales visits, mailings, advertising, trade association membership, referrals, and research, and it contained addresses, contact persons, pricing information, and detail about what each customer needed.

On secrecy: the company limited circulation of the list and told employees, through both an employment agreement and the handbook, that it considered the information valuable and confidential.

The relief followed the harm. The court permanently enjoined the former employees from doing business with the 32 customers who had moved over after being unlawfully solicited.

Notice what made the list protectable: accumulated effort and non obvious detail. A list of company names anyone could rebuild from a trade directory or an afternoon on LinkedIn is not a trade secret no matter what your handbook says about it. The protectable value sits in pricing history, margins, renewal dates, buying patterns, and who actually decides. Notice also when the case was won. Not after the resignation. In the years before it, in how the information was handled day to day.

The line is between announcing and using

A departing employee is entitled to compete and entitled to tell the market where they went. What they cannot do is use your confidential information to decide whom to call, what to offer, and where you are vulnerable on price. Most cases turn on that distinction, and most are proved with documents rather than testimony: what was downloaded, when, to what device, and what happened in the ninety days that followed.

What a case is actually worth

• An injunction. Section 3426.2 allows actual or threatened misappropriation to be enjoined, which in a customer case is usually the remedy that matters most.
• Damages. Section 3426.3 permits recovery of actual loss plus unjust enrichment not already counted in that loss, and where neither is provable, a reasonable royalty.
• Exemplary damages. For willful and malicious misappropriation, up to twice the award.
• Attorney fees, in either direction. Section 3426.4 allows fees for willful and malicious misappropriation, and equally for a claim of misappropriation made in bad faith. Thin claims filed to frighten a former employee are exactly the ones that produce fee awards against the company that filed them.
• A three year clock. Section 3426.6 runs from when the misappropriation was discovered or should have been discovered through reasonable diligence, and treats a continuing misappropriation as a single claim rather than a fresh one each day.

Do not build the plan on the trade secret exception

Employers still argue that a common law trade secret exception survives section 16600, so a restriction narrowly tailored to protect secrets should be enforceable. Be careful with that argument. In Dowell v. Biosense Webster, Inc. (2009) 179 Cal.App.4th 564, the Court of Appeal declined to decide whether such an exception exists at all, holding that even if it did, the noncompete and nonsolicitation clauses there were not narrowly tailored or carefully limited to protecting trade secrets. The trial court had found the clauses facially void and their use a violation of the unfair competition law.

An exception no court will confirm, combined with the enforcement exposure now written into section 16600.5, is a poor foundation for a retention strategy.

What to do before anyone resigns

This is where these cases are actually decided:

• Limit access to customer data to people who need it, and log who has it.
• Put the value in the file, not just the label. Pricing, terms, renewal dates, and account history are what make the compilation protectable.
• Use confidentiality and nondisclosure agreements that describe the actual categories of protected information, and keep the handbook language consistent with them.
• Control the exits. Retrieve devices, disable access the same day, and document what was returned.
• If you have noncompete language sitting in old agreements, deal with it rather than leaving it there. See our page on unfair business practices for how these clauses interact with the unfair competition law.

What to do in the first week after

• Preserve everything immediately. Laptops, phones, email, VPN and download logs, and cloud storage access records. Do not reissue the departing employee's laptop to someone else, which is the single most common way the proof disappears.
• Get the forensic picture before sending any letter. What you can prove determines whether you have a claim or an expensive theory.
• Move quickly if you need injunctive relief. Delay undercuts the irreparable harm argument that the whole remedy depends on.
• Consider what else travels with the conduct. Depending on the facts there may be claims for breach of contract, breach of fiduciary duty, or interference, and our post on the covenant of good faith and fair dealing covers one of them.

If you are the employee or the new employer

The same law protects you, and the exposure runs both directions. Arrive empty handed and document that you did. Do not forward files to a personal account "just in case," which is the fact pattern that turns a defensible departure into a willful misappropriation claim. If a former employer sends a letter resting on a noncompete, understand that the clause is void, that the letter may itself violate section 16600.5, and that section 3426.4 provides fees against a misappropriation claim brought in bad faith.

Talk to a Los Angeles business litigation attorney

The Darvish Firm's Los Angeles business litigation attorneys handle trade secret and unfair competition disputes for companies and for departing employees and their new employers across Southern California, including emergency injunctive relief and forensic preservation in the first days of a departure. Call (310) 677-3512 or request a consultation.

This article is general information about California law, not legal advice, and reading it does not create an attorney-client relationship. Every case depends on its facts. Consult an attorney about your specific situation.