Fannie Mae and Freddie Mac announced updates to the implementation dates and requirements for loan delivery and appraisal data under the Uniform Mortgage Data Program (UMDP). Fannie Mae also issued Lender Letter LL-2010-15, Uniform Appraisal Dataset and Uniform Collateral Data Portal, to provide formal notice of our appraisal data requirements under the UMDP and advance notice of related policy updates in connection with appraisal data standardization.