Assignment or attempted assignment by each Seller Party of this Agreement or any rights hereunder without first obtaining the specific written consent of Buyer, or the granting by each Seller of any security interest, lien or other encumbrances on any Purchased Assets to any person other than Buyer, the granting by a Seller Party Subsidiary of any security interest, lien or other encumbrances on any Contributed Mortgage Loan, any Contributed Rental Property or any Contributed REO Property to any person other than Buyer or nominee approved by Buyer.