In light of the development of the means of corruption crimes and the diversity of their methods including the use of modern technology in these crimes, and based on the growing idea of everyone's responsibility to address this crime and their right to do so, considering that the cooperation between members of society and the relevant state institutions is one of the most important ways to confront and address this crime, and since there is a potential threat to those who address reporting or witnessing the commission of these crimes, the Saudi Arabia has issued a new law for the protection of whistleblowers, witnesses, experts and victims, issued by Royal Decree No. (M/148) dated 8/8/1445 AH, which clarifies the mechanism for protecting whistleblowers, witnesses, experts and victims, and how they are subjected to the protection program, their responsibilities, and the forms of protection provided to them. In view of the vital role played by the witness in detecting and combating corruption crimes, and the emergence of a new law in the Kingdom that sets statutory rules for the protection of witnesses, this research aimed to answer a key question, what are the mechanisms for regulating the acceptance of witnesses in corruption cases within the protection program in the Saudi law and what are its obligations? This will be done using the descriptive and analytical research methodology, by studying the legal regulation of the admission of the witness to the witness protection program, and his obligations. The study reached several results, the most important of which are: the development of the Saudi regulation in corruption cases and the application of the necessary guarantees to ensure the protection of human rights, and highlighting the methods of its inclusion within the witness protection program in corruption cases and the limits of the witness's obligations, in the event when requesting for protection is approved.