California Defamation Law: Anti-SLAPP, Retraction, and Deadlines

California defamation law lets you sue someone who damages your reputation with a false statement of fact, and it splits those claims into libel (written or otherwise fixed) and slander (spoken). The rules live in Civil Code Sections 44 through 48a, which define the two forms, list the privileges that shield certain statements, and set special retraction rules for newspapers and broadcasters.¹ You have one year to file. And because California’s anti-SLAPP statute is among the strongest in the country, filing a weak claim can end with you paying the other side’s attorney fees.

What You Have to Prove

Every element has to be there. Miss one and the claim collapses. The Judicial Council’s standard jury instructions require a plaintiff to show:²

The defendant made a statement of fact, not pure opinion.
At least one other person heard or read it and understood it referred to the plaintiff.
The statement was false.
It was not covered by an absolute or qualified privilege.
The defendant was at least negligent about whether it was true.
The statement had a natural tendency to injure reputation, or it caused specific financial loss.

Truth is a complete defense. If the substance of what was said holds up, minor errors around the edges do not matter. A claim that someone “stole $5,000” survives as substantially true even if the real figure was $4,800.

When Opinion Becomes Actionable

Pure opinion is constitutionally protected and cannot support a defamation suit. The line moves when the opinion implies undisclosed facts the speaker seems to know. The test the jury instructions apply asks whether an average reader or listener, taking the statement in context, would understand the speaker to be implying a false fact is true.³ Calling a contractor’s work shoddy after describing what you saw is opinion. Saying you think that contractor is embezzling from clients implies hidden facts, and it can be sued on.

Libel or Slander, and Where Online Posts Fit

California draws the line based on how the statement was communicated. Libel is a false, unprivileged publication in writing, print, picture, or other fixed form that exposes a person to hatred, contempt, or ridicule, causes them to be avoided, or injures them in their occupation. Slander covers oral statements and other transient communications, including radio broadcasts.⁴

The category matters most for proving harm. Libel that is defamatory on its face carries presumed damages, so you don’t need to prove a specific financial loss.⁵ If the harmful meaning depends on outside context the reader has to supply, you must prove actual financial harm.

Slander normally requires proof of specific financial losses. The exception is slander per se, which under Section 46 covers falsely accusing someone of a crime, claiming they have a contagious or loathsome disease, saying they are unfit for their profession, or attacking their chastity. Harm is presumed in those categories.⁴

Social media posts almost always look like libel. They’re written, they stay visible, and they leave a permanent record. That works in a plaintiff’s favor when the post is defamatory on its face, because presumed damages apply. Video and audio posts complicate things, but they still tend to create a replayable, fixed record that reads more like libel than slander under the statutes.

Public Figures Face a Higher Bar

The fault level depends on who the plaintiff is. A private individual suing over a private matter needs to show only negligence — that the defendant failed to use reasonable care to check the statement before publishing it.²

Public officials and public figures must prove “actual malice,” a term of art from New York Times Co. v. Sullivan.⁶ It has nothing to do with ill will. Actual malice means the defendant either knew the statement was false or published it while entertaining serious doubts about its truth.⁷ It is a very hard standard to meet, which is why so many suits filed by politicians and celebrities fail.

Between the two sits the limited-purpose public figure. If you voluntarily inject yourself into a specific public controversy, the actual malice standard applies to statements about that controversy but not to unrelated matters. Whether a particular plaintiff falls into that category is often the most contested question in a California defamation case.

One Year to Sue

You have one year from the date of publication to file a defamation lawsuit in California, and the deadline applies to both libel and slander.⁸ Miss it and the case is over, regardless of how strong the evidence is.

The single publication rule stops the clock from restarting each time a new person sees the statement. Civil Code Section 3425.3 treats a single edition of a newspaper, one broadcast, or one book as giving rise to only one cause of action, however many readers or listeners it eventually reaches.⁹ The same logic applies to a website post: the clock starts when the content first goes live, not when someone stumbles across it later. Finding a defamatory article about yourself that went up 14 months ago probably means you are already out of time.

What You Can Recover

Damages fall into three buckets, each with its own proof requirements.

General damages compensate for the intangible harm: injury to reputation, shame, embarrassment, and emotional distress. When the case involves defamation per se, these damages are presumed. You do not need witnesses or documents proving people think less of you.

Special damages cover specific, provable financial losses tied directly to the statement. Lost wages, a canceled contract, a client who dropped you after reading the post. Each dollar has to be documented and linked back to the defamation. Vague claims that business declined won’t get there.

Punitive damages are reserved for the worst behavior. Civil Code Section 3294 requires clear and convincing evidence that the defendant acted with malice, oppression, or fraud.¹⁰ That is a higher standard than the usual “more likely than not.”

The Retraction Demand

California has a retraction statute that can sharply limit damages in certain cases. Under Civil Code Section 48a, when the defamatory statement appeared in a newspaper or was broadcast over radio, the plaintiff can recover only special damages unless they first demanded a retraction and the publisher failed to print one.¹¹

The demand must be in writing, must identify the specific statements claimed to be defamatory, and must be served on the publisher within 20 days after the plaintiff learns of the publication. If the publisher then prints a correction in a comparably prominent manner within three weeks, recovery is capped at special damages. If the publisher refuses, general and potentially punitive damages come back into play, though punitive damages still require proof of actual malice as Section 48a defines it.¹¹

The statute predates the internet and by its terms applies to newspapers and radio broadcasts. Whether it reaches online publications is unsettled in California courts. Sending a retraction demand still has practical value in any case, because it creates a record showing the publisher knew the statement was disputed, which can strengthen a later argument about fault.

Defenses the Other Side Will Raise

Beyond truth, the main defenses fall under the privilege rules in Civil Code Section 47.

Absolute privilege wipes out defamation liability entirely, regardless of the speaker’s knowledge or motive. It covers statements made in legislative proceedings, judicial proceedings, and other official proceedings authorized by law, along with statements made in the proper discharge of an official duty.¹² A witness who lies at a deposition cannot be sued for defamation over that testimony, though perjury and other consequences remain in play.

Qualified privilege protects communications made without malice between people who share a legitimate interest in the subject. Under Section 47(c), that covers situations like an employer giving a reference to a prospective employer, or a member of an organization reporting suspected misconduct to fellow members. Section 47(d) extends similar protection to fair and true reports of judicial, legislative, and other public proceedings.¹² A plaintiff can defeat qualified privilege by showing the defendant abused it by acting with malice or by publishing the statement more widely than the shared interest justified.

Anti-SLAPP: The Biggest Risk to a Plaintiff

California’s anti-SLAPP statute, Code of Civil Procedure Section 425.16, is the most powerful weapon available to defamation defendants. SLAPP stands for Strategic Lawsuit Against Public Participation, and the statute lets courts strike suits quickly when they target someone for exercising free speech or petition rights on a public issue.¹³

The defendant first shows the suit arises from protected activity: statements before an official proceeding, statements connected to an issue under government review, statements in a public forum on a matter of public interest, or other conduct in furtherance of free speech on a public issue. The burden then shifts to the plaintiff to demonstrate a probability of prevailing by producing admissible evidence sufficient to support a favorable judgment. If the plaintiff can’t make that showing, the claim is stricken.

The teeth are in the fee-shift. A defendant who wins an anti-SLAPP motion is entitled to recover attorney fees and costs from the plaintiff, and those fees are mandatory rather than discretionary.¹³ A weak defamation claim filed against someone who spoke out on a public issue can end with the plaintiff writing a check. The exposure runs both ways: if the court finds the anti-SLAPP motion itself was frivolous or filed to cause delay, the plaintiff can recover fees.

The statute has limits. Section 425.17 carves out commercial speech, so a business making factual representations about its own or a competitor’s products to actual or potential customers cannot hide behind an anti-SLAPP motion.

Suing Over an Online Post

Online defamation raises a question that catches plaintiffs off guard: who can you actually sue? Federal law gives website operators and social media platforms broad immunity for content posted by their users. Under 47 U.S.C. § 230(c)(1), no provider or user of an interactive computer service can be treated as the publisher or speaker of information provided by another content creator.¹⁴

If someone posts a false review of your business on Yelp or a false accusation about you on X, your defamation claim runs against the person who wrote the post, not the platform. The platform stays shielded even after being notified.

The immunity fades only when a platform crosses from hosting content to creating or developing it. Section 230 defines an information content provider as any person or entity responsible, in whole or in part, for the creation or development of the information.¹⁴ Writing a defamatory headline, materially altering a user’s post to make it defamatory, or designing a system to elicit illegal content can strip the protection. Routine moderation, such as editing for length or removing profanity, does not.

For most California plaintiffs, the practical consequence is identifying an anonymous poster and suing that individual, which typically requires a subpoena to the platform for account information. That adds time and cost inside an already tight one-year window.

1
California Legislative Information. California Code Civil Code 44 – Defamation
2
Justia. CACI No. 1704 – Defamation per se – Essential Factual Elements (Private Figure – Matter of Private Concern)
3
Justia. CACI No. 1707 – Fact Versus Opinion
4
California Legislative Information. California Code Civil Code 46 – Slander
5
California Legislative Information. California Code Civil Code 45a
6
Justia. New York Times Co. v. Sullivan, 376 U.S. 254 (1964)
7
Library of Congress. Constitution Annotated – Amdt1.7.5.7 Defamation
8
Justia. CACI No. 1722 – Affirmative Defense – Statute of Limitations
9
California Legislative Information. California Code Civil Code 3425.3
10
California Legislative Information. California Code CIV 3294 – Exemplary Damages
11
California Legislative Information. California Code CIV 48a
12
California Legislative Information. California Code Civil Code 47
13
California Legislative Information. California Code CCP 425.16
14
Office of the Law Revision Counsel. 47 USC 230 – Protection for Private Blocking and Screening of Offensive Material