False Advertising Laws: The FTC Act, the Lanham Act and Who Acts

Two federal laws reach false ads, and different people enforce them. The FTC Act lets the Federal Trade Commission act against unfair or deceptive practices Source [1]. The Lanham Act works another way. Its text names any person who believes they are or are likely to be damaged. The cause is a false or misleading claim in an ad Source [2]. Court rulings may narrow who can sue. We did not read them.

Autonomah works with the advertising rules of each industry and country Source [5].

This is general information, not legal advice. It covers two federal laws. It also covers the FTC's 1983 test for deception. We did not read state laws. They also apply. The FTC Act text is the 2024 edition on GovInfo. The Lanham Act text is the USPTO's compilation dated July 15, 2026 Source [2]. Check the current text before you rely on a quote.

The two routes side by side

• FTC Act § 5, 15 U.S.C. 45(a). The FTC acts. It reaches unfair or deceptive acts or practices Source [1].
• Lanham Act § 43(a), 15 U.S.C. 1125(a)(1)(B). A person who believes they are or are likely to be damaged acts. It reaches false or misleading claims of fact in ads Source [2].

The USPTO's manual calls the statute the Lanham Trademark Act Source [4].

The FTC route

Section 45(a)(1) makes these acts unlawful. Section 45(a)(2) says the Commission is empowered and directed to prevent them Source [1]. It acts when it has reason to believe a business is doing so. It also needs a public interest in a proceeding. Then it issues a complaint with a notice of hearing Source [1]. The business may then show cause. It argues that no cease and desist order should issue Source [1]. A court of appeals can review an order. The business has sixty days from service to file a petition Source [1].

The FTC defined "deceptive" in a 1983 policy. It notes that nowhere was there a single definitive statement of its view Source [3]. It says deception needs three things Source [3]:

• A claim, omission or practice likely to mislead.
• A consumer acting reasonably.
• A claim material to the consumer's choice.

More from the same policy:

• The test is whether the practice is likely to mislead. It is not whether anyone was misled Source [3].
• The Commission reads the entire ad. In its words, "the entire mosaic, rather than each tile separately" Source [3].
• Fine print may not fix a misleading claim Source [3].
• The Commission presumes that express claims are material Source [3].
• It generally will not pursue obviously exaggerated or puffing claims. These are claims that ordinary consumers do not take seriously Source [3].

Two more parts of the same Act matter here. Section 12, 15 U.S.C. 52, bars spreading a false ad by any means. The ad must aim at a purchase, or be likely to induce one. The goods are food, drugs, devices, services or cosmetics. Such an ad is an unfair or deceptive practice under 45 Source [6].

Section 55(a)(1) defines a false ad. It is one, other than labeling, that is misleading in a material respect Source [7]. To judge that, take into account what the ad states or suggests. Words, design, device, sound or any mix can do it. Take into account also how far the ad fails to reveal material facts Source [7]. Our read: an ad can mislead through what it implies. Silence about a material fact can count.

The guide to false advertising examples walks through four named kinds.

Endorsements and testimonials

The FTC's endorsement guides, 16 CFR Part 255, interpret laws the FTC enforces Source [8]. They apply on social media too. Key points Source [8]:

• Endorsers must give their honest opinions, findings, beliefs or experience Source [8].
• An advertiser may be liable for a deceptive endorsement. The endorser need not be liable Source [8].
• Some ties must be disclosed clearly and conspicuously. These are ties the audience does not expect. They might also change how the audience weighs the endorsement Source [8].
• Material ties can include payment, free or discounted products, early access and a chance to win a prize Source [8].

Our guide to Instagram giveaway rules applies the last two points. It does so for contests.

What these laws do not do

The sections we read are mostly general. A few name one industry, such as the margarine and drug ad rules in § 55 Source [7]. Other industries have their own rules. Two have guides on this blog. One is the SEC Marketing Rule for investment advisers. The other is social media for lawyers. Our read: if your business is in a regulated field, check that field's rules. The general laws are the floor.

The Lanham Act route

Subparagraph (B) of 1125(a)(1) covers a person who misrepresents something in an ad or promotion Source [2]. The something is the nature, characteristics, qualities or geographic origin of "his or her or another person's" goods, services or commercial activities Source [2]. That person is liable in a civil suit. The text lets any person who believes they are or are likely to be damaged bring it Source [2]. Court rulings may narrow that. We did not read them. Our read: the text covers another person's goods. So a false claim about a rival's product is in reach.

Subparagraph (A) is different. It covers a claim likely to cause confusion or to deceive. The claim is about how one person is linked to another. It also covers who sponsors or approves a good or service Source [2]. Our read: a claim that another brand approves your product belongs there.

This page did not read the parts on remedies. It does not say what a court can award.

State laws

This page did not read state laws or court rulings. They can change the answer for a given ad. Ask a lawyer where a claim is risky.

A check for each claim

The checklist is ours. Neither law asks for it.

1. Write the claim as a fact that could be true or false.
2. Ask what a reasonable consumer takes from the whole ad. Read headline and fine print together Source [3].
3. If the claim is about a rival's goods, keep the proof of it. The text lets a rival that believes it is damaged sue. Court rulings may narrow that Source [2].
4. Keep a dated proof file with the claim. It can be a test or a price list with its date. The laws ask whether an ad misleads. A file like that is how you answer if someone asks. None of these sources requires it.

Step 2 needs a reader's eye on the whole ad. It is hard to hand off. When Autonomah makes the ads, you approve every piece Source [5].

How Autonomah does it

Autonomah is an artificial creative brain. It thinks up, creates and publishes a brand's advertising Source [5]. Before it creates, it studies the business, the audience, the competitors and the industry rules Source [5]. It reads your site and social accounts. It applies the rules of the country you choose Source [5]. You approve, ask for a change or reject each piece. Nothing goes out without your OK Source [5]. See the steps from brand study to approval.

Frequently asked questions

What are the main federal false advertising laws?

Section 5 of the FTC Act. It makes unfair or deceptive acts or practices in or affecting commerce unlawful Source [1]. And § 43(a) of the Lanham Act. It allows a civil suit over a false or misleading statement of fact. Part (B) covers one made in advertising or promotion Source [2].

Can a competitor sue over false advertising?

The text allows it. Section 43(a)(1)(B) of the Lanham Act covers a person who misstates the facts. That person is liable in a civil suit Source [2]. The text lets any person who believes they are or are likely to be damaged bring it Source [2]. Court rulings may narrow who qualifies. This page did not read them. Neither did it read what a business can recover.

What counts as a false advertisement under the FTC Act?

For sections 52 to 54, it is an ad that is misleading in a material respect. That includes what it fails to reveal Source [7].

What are some examples of illegal advertising?

From the sources on this page, two kinds. One is a false ad for food, drugs, devices, services or cosmetics, as section 55 defines it for sections 52 to 54. It is misleading in a material respect Source [7]. The other is an endorsement that hides a material tie. The FTC guides treat it as deceptive Source [8]. This is not a complete list.

Is puffery false advertising?

The FTC's 1983 policy says the Commission generally will not pursue obviously exaggerated or puffing claims. These are claims that ordinary consumers do not take seriously. It adds that some exaggerated claims may be taken seriously. Those are actionable Source [3].