(a) the commercial practice of lenders trading or selling mortgages on the secondary market;

(b) the replacement of a construction loan with permanent financing;

(c) the refinancing of an existing loan with a new lender, such as where the original lender assigns a note and the mortgage securing its payment to another lender in return for consideration and such mortgage is consolidated with another mortgage which secures any funds advanced by the new lender to the mortgagor;

(d) the modification of the terms of a loan by a mortgagor and mortgagee in order to avoid foreclosure; and

(e) a refinancing that occurs in conjunction with the sale of property such that the seller conveys property to the purchaser subject to the lien of the mortgage and the original lender assigns its note and mortgage on the property to the purchaser's lender. 3. Except with respect to the assignment of a mortgage in connection with a transaction described in paragraph (a) of subdivision two of this section, in order to record an assignment of a mortgage there must be set forth in the assignment document or attached thereto and recorded as part thereof a statement under oath signed by the mortgagor or any other party to the transaction having knowledge of the facts (provided such other party asserts such knowledge), that the assignee is not acting as a nominee of the mortgagor and that the mortgage continues to secure a bona fide obligation. With respect to the assignment of a mortgage in connection with a transaction described in paragraph (a) of subdivision two of this section, such assignment shall contain the following statement: "This assignment is not subject to the requirements of section two hundred seventy-five of the Real Property Law because it is an assignment within the secondary mortgage market."