What is false advertisement? False advertisement is untrue or misleading information given to you to get you to buy something, or to come visit their store.Gov or call 800.952. In today's complex marketplace, individuals have a fundamental right to be protected from misleading, deceptive, or fraudulent advertising practices. California's Business and Professions Code § 17500 prohibits advertising that is false or misleading in any way. Under the law, claims in advertisements must be truthful, cannot be deceptive or unfair, and must be evidence-based. Deceptive advertising involves misleading or false claims made in marketing and promotional materials, violating consumer protection laws and regulations. Deceptive advertising involves misleading or false claims made in marketing and promotional materials, violating consumer protection laws and regulations. You may also hear this person referred to as a false and misleading advertising lawyer. Contracts that include deceptive components in the "fine print".