This paper is to examine two matters, firstly, the legal power of the land title certificate is related to legal certainty in land registration, and, secondly, legal remedies undertaken to ensure legal certainty in land affairs. At the end of this paper, it is concluded that: first, the legal power of the land title certificate is a guarantee of legal certainty from the certificate as a proof of ownership which is strong, provided that it is not proven otherwise by others who feel entitled and have evidence to prove it. And, secondly, the efforts to be taken to guarantee legal certainty in the land sector carried out by the Government-in this case the Ministry of Agrarian Affairs and Spatial-, are issuing land title certificates based on three principles, namely: (1) the principle of certainty law, (2) the principles of accuracy, and (3) the principle of security, for the sake of the enforcement of legal force and legal certainty of issued certificates.