This paper reviews legal conditions and procedures for telecommunication companies/inter portals to provide investigation authorities with communication confirmation data and communication data. Various discussions have been done in reference to the communication data provision system. Now, it’s time to produce results which accord with the people’s safeguard for human rights based on these discussions. Compared with communication data provision system, provision system of data to prove communication facts can be assessed as seriously infringing on basic human rights and as a result, it has been operated through control of courts like the case of communication restriction measures and urged to follow a number of regulations related with those restriction measures. In this paper, the author highlighted the misuse of communication data and communication confirmation data. The misuse and abuse of these data have caused lots of problems in modern society. Therefore, all people maybe recognized that we need to control the system of communication information. As a matter of fact, the court have made considerably different decisions about responsibility of internet portal. In this respect, the author suggested that we need more provisions on communication information provision and self-screening system definitely.