All the transactions done by users are recorded in the server. All the things about the date and time of user's log in, where exactly in the program is used, which date is added, edited or deleted, when the program was logged off, and through which IP Address, MAC Address, computer the transactions was made and by which user are recorded. Thus, any fault that might occur on the records and the user that caused it can easily be specified. Also, it is possible to bring back the changed or deleted records. By doing this, the changes in the data which are made by fault or malicious intention can be taken back.