Fannie Mae will no longer purchase or securitize mortgages on properties encumbered by certain transfer fee covenants that were created on or after Feb. 8, 2011, under a new policy that goes live next week. The policy, which takes effect July 16, follows a rule finalized by the Federal Housing Finance Agency in March that prohibits Fannie, Freddie Mac and the Federal Home Loan Banks from taking on mortgages “encumbered by certain types of transfer fee covenants and related securities.” In light of the new policy, mortgages on affected properties must be purchased by Fannie as whole loans no later than July 13, 2012, or must be delivered by July 13 into MBS pools with issue dates before July 1, 2012.