A blanket loan, or blanket mortgage, is a type of loan used to fund the purchase of more than one piece of real property. Blanket loans are popular with builders and developers who buy large tracts of land, then subdivide them to create many individual parcels to be gradually sold one at a time. Traditional mortgages typically have a "due-on-sale clause", which stipulates that if property secured by the mortgage is sold, the entire outstanding mortgage debt must be paid in full immediately. With a blanket mortgage, a "release clause" allows the sale of portions of the secured property and corresponding partial repayment of the loan. This is done to facilitate purchases and sales of multiple units of property with the convenience of a single mortgage.