Once I start a short sale, am I obligated to complete the process? A: If you find a way to save your house, you can cancel the short sale up until we provide the acceptable written short sale approval letter(s) to the buyer. This occurs at the very tail end of the long and arduous short sale process, giving you plenty of opportunity to find a way to save your house. Once the buyer has possesion of the short sale approval letter(s), you are then obligated to close escrow, usually within 45 days.