This mortgage assumption agreement allows a new borrower ("Borrower") to assume an existing mortgage from the original borrower. An assumable mortgage is a type of home financing arrangement where an outstanding mortgage and its terms are transferred from the current owner to the buyer.FEDERAL DEPOSIT INSURANCE CORPORATION, as RECEIVER of BANK OF. Ensure all necessary financial information is accurately provided. Assumption of Loan Requirement Letter for disaster loan servicing action request packages. About this document and download.