Repossession does not necessarily satisfy the loan. If the repossessor sells the asset for an appropriate amount, and if that amount is less than the amount of the loan, and if the repossessor sues the debtor for the balance (plus reasonable fees if applicable) in a timely manner, the debtor may be liable to pay the balance (sometimes called the "deficiency"). In this case the creditor will be liable for contributory negligence if the creditor auctions the property for less than applicable blue-book value. This is because such a failure directly contributes to any remaining deficiency. To avoid this liability, financial institutions will document a source (such as Kelley Blue Book or NADA) to price the collateral for sale. They will also document the condition of the vehicle to justify the sales price of it.