''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.