Marketing lives on bold claims, but California draws hard lines around what a business may say about its products, prices, and results. False advertising exposure comes not just from the Attorney General but from competitors, consumer class actions, and district attorneys — often over statements the business thought were harmless. This article maps the main statutes and the claims that most often draw fire.
The two statutes that power most claims
California's False Advertising Law (Bus. & Prof. Code § 17500) prohibits statements about products or services that are untrue or misleading, and that the speaker knew or reasonably should have known were untrue or misleading. Its companion, the Unfair Competition Law (Bus. & Prof. Code § 17200), reaches any "unlawful, unfair or fraudulent" business practice — which means a violation of many other statutes (including the FAL, labeling rules, and licensing laws) can also support a UCL claim.
Two features make these statutes unusually potent. First, the substantive standard is whether members of the public are likely to be deceived — intent to deceive is not required, although a private plaintiff must satisfy the UCL's standing and reliance requirements. Second, remedies include restitution and injunctions, and public prosecutors can seek civil penalties of up to $2,500 per violation. The Consumers Legal Remedies Act (Civ. Code § 1750 et seq.) adds damages and attorney's fees for a long list of misrepresentations in consumer transactions.
Puffery versus factual claims
Not every enthusiastic statement is actionable. Courts distinguish puffery — vague, subjective boasts no reasonable consumer would rely on ("the ultimate driving experience," "world-class service") — from factual claims that can be proven true or false ("lasts twice as long," "clinically shown to reduce pain," "lowest prices in Los Angeles"). The line is narrower than most marketers assume:
- Specific numbers, percentages, and comparisons are factual claims. You need substantiation in hand before you publish, not after a demand letter arrives.
- Health, safety, and performance claims draw the most scrutiny and typically require competent and reliable scientific evidence.
- Implied claims count. An ad can be literally true and still misleading based on what it implies or omits.
Pricing claims: sales, discounts, and "former price" ads
Bus. & Prof. Code § 17501 makes it unlawful to advertise a former price unless it was the prevailing market price within the three months immediately preceding the ad (or the ad clearly states when the former price was in effect). Perpetual "50% off" sales, inflated reference prices, and strikethrough prices that no one ever paid are classic targets — several major retailers have paid multimillion-dollar settlements over exactly this practice. Drip pricing, hidden fees, and misleading "free" offers raise similar issues under the UCL and, since 2024, California's ban on hidden fees in advertised prices (Civ. Code § 1770(a)(29)).
Origin, endorsement, and review claims
- "Made in USA." Bus. & Prof. Code § 17533.7 restricts the label to products where foreign content is within tight statutory limits. Federal FTC rules apply on top.
- Testimonials and endorsements. Under the FTC Endorsement Guides, material connections — paid influencers, free product, employee reviewers — should be disclosed. Nondisclosure can also support a § 17200 claim.
- Reviews. Posting fake reviews, suppressing negative reviews through intimidation or certain deceptive practices, or paying for reviews without disclosure violates the FTC's 2024 rule on consumer reviews and invites UCL claims.
- Environmental claims. "Green," "compostable," and "recyclable" claims are regulated by Bus. & Prof. Code §§ 17580–17581 and the FTC Green Guides.
Who can come after you
False advertising claims arrive from several directions: the California Attorney General and district attorneys (civil penalties), the FTC (federal enforcement), consumer class actions (restitution under the UCL/FAL, damages under the CLRA), and competitors, who can sue under the Lanham Act for false advertising that costs them sales. Competitor suits are increasingly common because the loser of market share is often the first to notice an inflated claim.
A practical pre-publication checklist
- Identify every objective claim in the ad — express and implied — and confirm you hold substantiation for each one now.
- Check price and discount claims against § 17501's 90-day rule; keep records of actual prevailing prices.
- Disclose material connections for every testimonial, influencer post, and review program.
- Vet origin, health, and environmental claims against the specific statutes above.
- Keep a dated substantiation file. If a regulator or plaintiff writes, your first response is much stronger when the evidence predates the ad.
An advertising review is a small, fixed-scope project for a regulatory compliance attorney — and if a demand letter or lawsuit has already arrived, early strategy matters, because UCL and CLRA claims have procedural traps for unprepared defendants. Our business litigation practice sees the same handful of avoidable claims again and again.
Talk to a California business attorney
Whether you want your marketing reviewed before launch or you have received a false advertising demand, an early conversation costs nothing. Schedule a free consultation or call (949) 418-2113.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. Facts matter; consult a lawyer about your specific situation.
