Due diligence analysis or screening is a process conducted by experts during decision procedure on buying or selling a business firm, selecting a business partner, merging, acquisition or accession into any type of collaboration and selecting a further development strategy. The main disciplines of due diligence are financial, legal and commercial that can be divided into several different types. For each discipline, a team of experts will be selected to collect and analyze data from their area of activity. The most common way of expanding the business is acquisition, so through the stages of acquisition it is easiest way to understand the due diligence process. Due diligence is the final part of the second phase in acquisition and is preceded to negotiations and closure or waiver of work. Although there are a number of reasons why to conduct a due diligence analysis, there are several obstacles, but if due diligence is structured in accordance with time limits and business mode, there should be no problem. Also, during the due diligence process we can come across on some disadvantages and facts unfavorable to the potential buyer and based on these findings it is necessary to conclude which protection measures are needed. The most common form of actualization legal protection are guarantees and damages and through them the buyer wants to be secure as much as possible.In all the forms of business expansion, and even the smallest changes in organization, there are possibilities for many risks. These are the operational and legal risks, the risk of legislation and the risk of reputation that also take place into business risks, market risk, credit risk and liquidity risk as part of financial risk.In addition to these main divisions, there are other kind of risks, such as the risk of fraud and the risks occurring at each stage of the acquisition process or the conclusion of another business. Experts in due diligence analysis are of great importance in minimizing all risks during expanding and improving business.Experts are the ones who need to understand why the results are as they are and regarding that try to predict the future status of the organization. During risk assessment, people in charge of the due diligence process can use various methods and tools. One of these methods is the FMEA method by which the risks rank from the highest hazard stage to the least harmful and thay are resolved in that order. Experts should also be focused on facts indicating that a target company is flippant or has hostile intentions in order to prevent unsuccessful work assembling which potential buyer will not achieve the desired aim. If, due to due diligence, a potential buyer manages to match the conditions most favorable to him, business is considered to be successfully closed. After the agreements have been concluded, it requires to invest huge effort to the integration in order to achieve the desired result - business expansion and accessing new markets.