The Unfair Deceptive Acts and Practices Act deals essentially with unfair business and trade practices of a given business with respect to products and services that it renders. Most states have their own version of this statute. There is a federal statute on the subject.The purpose of the statute in general is to prohibit unfair and deceptive practices by a business to a consumer. Courts look at what is unfair and deceptive on a case by case basis but in general the test is to determine if the business is acting fairly, honestly, or morally in its business practices with respect to its product or services.If a business has a practices of deceiving consumers about the quality of car being purchased as being in great condition but there is a pattern that the "great condition cars" had hidden problems known to the dealer, that would be a violation of the Unfair Deceptive Acts and Practices Act.