CommitmentCommitmentContractual agreement between you and Fannie Mae where Fannie Mae agrees to buy a Mortgage Loan at a future date in exchange for an MBS, or at a specific price for a Cash Mortgage Loan, and you agree to Deliver that Mortgage Loan. to purchase a permanent 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. for a to-be constructed or rehabilitated PropertyPropertyMultifamily residential real estate securing the Mortgage Loan, including the fee simple or Leasehold interest, Improvements, and personal property (per the Uniform Commercial Code)..