Depending on situations and jurisdictions, due diligence review could either be a legal standard of care or voluntary investigation. It is typically used in mergers and acquisitions ("M&A"). Both the buyers and sellers could initial due diligence reviews, since both parties have the obligation to assure the legitimacy of the transactions. AVISTA provides different types of due diligence services, ranging from operational due diligence, financial due diligence, environmental due diligence to compliance due diligence.