due diligence(But the hostile takeover of Bank of Moscow, Russia's sixth-largest, led to criminal charges against former top managers Andrei Borodin and Dmitry Akulinin and the biggest bailout in Russian banking history amid accusations that VTB had spectacularly failed to perform proper due diligence. TMT Alexander Demidov)
defence of due diligence(the accused took all due care to try to prevent the commission of the offence. Тот, кто спрашивает "что это?", пожалуйста, введите термин на русском в yandex, или на английском в google. pchela)