Due diligence is a kind of investigation which is done before entering into a transaction with some other party to check the facts. The purpose of due diligence or this investigation is to protect both parties, although primarily the purchaser. It can help to reveal the potential liabilities and financial matters, just to make sure that nothing is hidden. Its basic aim is to check the valuation of assets and liabilities, assess the risks within a business, and identify areas for further investigation.