The law does not define any specific business actions that violate the law; rather it states that "unfair or deceptive practices" are illegal. File a consumer complaint.Are you having a problem with a business? If you suspect a person or business is engaging in unfair or deceptive business practices, you should contact a consumer protection office in your area. Knowing the process for filing a complaint against a business is critical for consumers seeking justice against unfair or deceptive practices. 93A is the primary consumer protection law in Massachusetts. Section - Unfair and deceptive trade practices. 93A, protects consumers from unfair and deceptive acts and practices which occur in a business context. The Massachusetts consumer protection statute is Chapter 93A of the Massachusetts General Laws. Such violations may be reported to the office of the attorney general or the director of consumer affairs and business regulation.