Upon receipt of all sums owing and outstanding under the Loan Documents, Bondowner Representative shall issue a full reconveyance of the. In real estate transactions, an assumption agreement allows a third party to "assume" or take over the loan of the property's seller.There's not a database of mortgages specifically for loans that are assumable. Your best bet is going to be to figure out lender(s) are approving assumptions. An assumable mortgage involves one borrower taking over, or assuming, another borrower's existing home loan. Find out how it works. Log in to your Freedom Mortgage account.