Assumption of SBA Loan. Assumption of Loan Requirement Letter for disaster loan servicing action request packages.About this document and download. Proof of ongoing insurance on the collateral with the SBA named as mortgagee must be provided. Another option to sell a business with an SBA loan is for the buyer to assume the loan. SBA loans are fully assumable with SBA approval. An assumable mortgage involves one borrower taking over, or assuming, another borrower's existing home loan. Find out how it works. In this workshop, we cover all things concerning your COVID Economic Injury Disaster Loan (EIDL) in conjunction with the US Small Business Administration. Your borrower should send a written request to their current bank asking for them to provide the entire SBA loan file to your bank for review.