Mass. Gen. Laws ch. 186A § 1
"Bona fide lease or bona fide tenancy", a lease or tenancy shall not be considered bona fide unless: (1) the mortgagor, or the child, spouse or parent of the mortgagor under the contract, is not the tenant; and (2) the lease or tenancy was the result of an arms-length transaction.
"Entity", a business organization, or any other kind of organization including, without limitation, a corporation, partnership, trust, limited liability corporation, limited liability partnership, joint venture, sole proprietorship or any other category of organization and any employee, agent, servant or other representative of such entity.
"Eviction", an action, without limitation, by a foreclosing owner of a housing accommodation which is intended to actually or constructively evict a tenant or otherwise compel a tenant to vacate such housing accommodation.
"Foreclosing owner", an entity that holds title in any capacity, directly or indirectly, without limitation, whether in its own name, as trustee or as beneficiary, to a housing accommodation that has been foreclosed upon and either: (1) held or owned a mortgage or other security interest in the housing accommodation at any point prior to the foreclosure of the housing accommodation or is the subsidiary, parent, trustee, or agent thereof; or (2) is an institutional mortgagee that acquires or holds title to the housing accommodation within 3 years of the filing of a foreclosure deed on the housing accommodation; or (3) is the Federal National Mortgage Association or the Federal Home Loan Mortgage Corporation.
"Foreclosure", a legal proceeding to terminate a mortgagor's interest in property, instituted by the mortgagee, and regulated under chapter 244.
"Housing accommodation", a building or structure, or part thereof or land appurtenant thereto, and any other real or personal property used, rented or offered for rent for living or dwelling purposes, together with all services connected with the use or occupancy of such property.
"Institutional mortgagee", an entity or an entity which is the subsidiary, parent, trustee or agent thereof or otherwise related to such entity, that holds or owns mortgages or other security interests in 3 or more housing accommodations or that acts as a mortgage servicer of 3 or more mortgages of housing accommodations.
"Just cause", 1 of the following: (1) the tenant has failed to pay the rent in effect prior to the foreclosure or failed to pay use and occupancy charges, as long as the foreclosing owner notified the tenant in writing of the amount of rent or the amount of use and occupancy that was to be paid and to whom it was to be paid; (2) the tenant has materially violated an obligation or covenant of the tenancy or occupancy, other than the obligation to surrender possession upon proper notice, and has failed to cure such violation within 30 days after having received written notice thereof from the foreclosing owner; (3) the tenant is committing a nuisance in the unit, is permitting a nuisance to exist in the unit, is causing substantial damage to the unit or is creating a substantial interference with the quiet enjoyment of other occupants; (4) the tenant is using or permitting the unit to be used for any illegal purpose; (5) the tenant who had a written bona fide lease or other rental agreement which terminated, on or after August 10, 2010, has refused, after written request or demand by the foreclosing owner, to execute a written extension or renewal thereof for a further term of like duration and in such terms that are not inconsistent with this chapter; (6) the tenant has refused the foreclosing owner reasonable access to the unit for the purpose of making necessary repairs or improvement required by the laws of the United States, the commonwealth or any subdivision thereof, or for the purpose of inspection as permitted or required by agreement or by law or for the purpose of showing the unit to a prospective purchaser or mortgagee provided. Nothing in the section shall limit the rights of a third-party owner to evict a tenant at the expiration of an existing lease.
"Mortgagee", an entity to whom property is mortgaged, the mortgage creditor or lender including, but not limited to, mortgage servicers, lenders in a mortgage agreement and any agent, servant or employee of the mortgagee or any successor in interest or assignee of the mortgagee's rights, interests or obligations under the mortgage agreement.
"Mortgage servicer", an entity which administers or at any point administered the mortgage; provided, however that such administration shall include, but not be limited to, calculating principal and interest, collecting payments from the mortgagor, acting as escrow agent or foreclosing in the event of a default.
"Tenant", a person or group of persons who at the time of foreclosure is entitled to occupy a housing accommodation pursuant to a bona fide lease or tenancy or a tenancy at will. A person who moves into the housing accommodation owned by the foreclosing owner, subsequent to the foreclosure sale, without the express written permission of the foreclosing owner shall not be considered a tenant under this chapter.
"Unit" or "residential unit", the room or group of rooms within a housing accommodation which is used or intended for use as a residence by 1 household.
Mass. Gen. Laws ch. 186A, § 1