In a short sale, the bank or mortgage lender agrees to discount a loan balance because of an economic or financial hardship on the part of the borrower. The home owner/debtor sells the mortgaged property for less than the outstanding balance of the loan, and turns over the proceeds of the sale to the lender. Neither side is "doing the other a favor;" a short sale is simply the most economical solution to a problem. Banks will incur a smaller financial loss than would result from foreclosure or continued non-payment. Borrowers are able to mitigate damage to their credit history, and partially control the debt. A short sale is typically faster and less expensive than a foreclosure. It does not extinguish the remaining balance unless settlement is clearly indicated on the acceptance of offer.
Lenders often have loss mitigation departments that evaluate potential short sale transactions. The majority have pre-determined criteria for such transactions, but they may be open to offers, and their willingness varies. A bank will typically determine the amount of equity (or lack thereof), by determining the probable selling price from an appraisal or Broker Price Opinion (abbreviated BPO or BOV).
Lenders may accept short sale offers or requests for short sales even if a Notice of Default has not been issued or recorded with the locality where the property is located. Given the unprecedented and overwhelming number of losses that mortgage lenders have suffered from the 2009 foreclosure crisis, they are now more willing to accept short sales than ever before. This presents an opportunity for "under-water" borrowers who owe more on their mortgage than their property is worth and are having trouble selling to avoid foreclosure as a result.