Undivided interest in a 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. per the participation certificate for a specified percentage of principal (and proportionate rights and benefits of the Participation Interest seller in any 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. collateral or guaranty), and a specified yield.