The due diligence process is often considered the most important part of any acquisition or merger. It can make or break the deal and often leads to restructuring of the trade. On large transactions, a team is usually assembled including accountants, engineers, geologists, lawyers and landmen. On smaller acquisitions, an oil and gas consultant is often asked to provide complete due diligence services without significant support by other legal, engineering or accounting professionals.What is expected of us as consultants and what should the Investor expect to receive? To fully grasp the importance of the mission, it must be remembered that due diligence is conducted by independent third parties and if done correctly, serves to protect the Investor. Therefore, it is the responsibility of the oil and gas manager, when working in an independent capacity, to fully explore the transaction prior to the closing.