Verbraucherschutz
Consumer protection laws also provide some protection against landlord harassment in some states. One such statute is Chapter 93A of the Massachusetts General Laws, commonly called the "Consumer Protection Law". Like the Federal Trade Commission Act on which it is based, and similar "baby FTC" laws in other states, it prohibits the use of any unfair and deceptive acts and practices in the conduct of any trade or business. Housing rental is generally considered to be a trade or business, and the Massachusetts Attorney General has issued regulations which define unfair and deceptive acts or practices in the rental housing field. Practices defined as unfair include failure by the landlord to disclose, to a tenant or prospective tenant, any fact of the disclosure of which may have influenced the latter not to enter into the transaction. Also defined as an unfair practice is any violation of any law meant to protect consumers and any act which is oppressive or otherwise unconscionable in any respect. While the Consumer Protection Law provides some protections for tenants. If a landlord is the owner-occupant of a two-family or three-family house and owns no other rental property, he or she is not considered to be engaged in a trade or business, and is not subject to this law.