When a home is sold, the seller may be able to transfer the mortgage to the new buyer. This means the mortgage is assumable. Lenders generally require a credit review of the new borrower and may charge a fee for the assumption. Some mortgages contain a Due on Sale clause, which means that the mortgage may not be transferable to a new buyer. Instead, the lender may make the borrower pay the entire balance that is due when the home is sold. Assumability can help the seller attract buyers when he/she sells his/her home.