When you are beaten by others without monitoring on the scene, but the other party refuses to admit it, the first thing you should do is to go to the hospital in time for medical treatment, and properly keep all medical certificates and other relevant evidence. These medical certificates and other materials will play an important role in the process of rights protection. Next, you need to report to the public security organ. The public security organ will carry out investigation and evidence collection according to relevant procedures, including questioning relevant witnesses and collecting various other possible evidence. In this process, you should also actively cooperate with the work of the public security organ, truthfully state the whole process of the incident to the public security organ, without any concealment or false statement. Within the scope of civil litigation, according to the basic principle of "who claims, who provides evidence", you have the responsibility to assume the obligation of providing evidence to prove that the other party has beaten you. However, due to the lack of direct monitoring evidence, other indirect evidence, such as medical records and witness testimony, can be used as auxiliary evidence to help you prove the facts. If a complete chain of evidence can be formed through these indirect evidences, which is enough to prove the other party's beating behavior conclusively, then you can ask the other party to bear the corresponding civil liability for compensation according to law, such as medical expenses incurred due to medical treatment, and work delay expenses caused by inability to work normally. If the other party's beating behavior has caused your physical injury to the extent of minor injury or above, then the other party may be suspected of a criminal offence and need to bear the corresponding criminal responsibility.
