Mortgagee.
Mortgagee. For purposes of this part, the term mortgagee includes:
(1) The original lender under the mortgage, as that term is defined at sections 201(a) and 207(a)(1) of the National Housing Act (12 U.S.C. 1707(a), 1713(a)(1));
(2) A lender, as defined in this section;
(3) A branch office or subsidiary of the mortgagee or lender; or
(4) Successors and assigns of the mortgagee or lender, as are approved by the Commissioner.