From Longman Business Dictionarydue diligenceˌdue ˈdiligenceLAW1ACCOUNTINGwhen a company thinking of buying another looks carefully at its accounts, as it must do by law before the deal can be agreedThe acquisition is subject to a due diligence review by the central bank and approval from the government.2FINANCEwhen an organization selling investments checks their quality before selling them in order to protect investorsDiscipline in the due-diligence area often breaks down when times are busy. → diligence