Mortgage LoanMortgage LoanMortgage debt obligation evidenced, or when made will be evidenced, by the Loan Documents, or  a mortgage debt obligation with a Fannie Mae credit enhancement. backing an MBSMBSMortgage-Backed Security , PFP MBSPFP MBSMBS backed by a PFP Mortgage Loan. , or REMICREMICReal Estate Mortgage Investment Conduit .