The land mafia has undermined the legal order in Indonesia, not only at the level of investigations, but also at the end of the judicial system. Conflicts between the land mafia and the people often become conflicts between the strong and the weak. The rise of the land mafia shows that land is a high and promising economic investment community that attracts interest in owning and controlling it in various ways, resulting in lawlessness, disputes, and conflicts in the land sector. These land mafias have a variety of modes that can be used to be able to take over land owned by others. The eradication of the land mafia in Indonesia has been specially instructed by the President of the Republic of Indonesia Joko Widodo by deploying law enforcement officials and the Attorney General's Office to prevent the eradication of the land mafia in Indonesia. This research discusses law enforcement in the eradication of the land mafia in Indonesia and discusses the legal protection of Notaries /PPAT in the case of land mafia in Indonesia. This research is a normative juridical research using a statutory approach, a concept approach, and an analytical approach. Data collection techniques are obtained by means of literature research and data analysis using descriptive qualitative analysis. The establishment of the Anti-Land Mafia Task Force aims to eradicate criminal practices indicated by the land mafia and the modus mosud of the land mafia. The modes of the land mafia are very diverse such as falsifying data, entering the yards of houses without rights, taking away the property rights of others, etc. Law enforcement in the eradication of the land mafia should be a priority for the Government. The establishment of the Anti-Land Mafia Task Force is an instruction from the President of the Republic of Indonesia Joko Widodo, but the President who is the head of state should not only instruct but the President must also evaluate the performance of the Anti-Land Mafia Task Force. Notaries/PPAT do not have duties and obligations in eradicating the land mafia because Notaries/PPAT there are general officials and state officials who have the obligation to make an authentic deed. Notaries/PPAT need to protect themselves and their profession from land mafia cases. Notaries/PPAT need to apply the principles of accuracy and prudence in making authentic deeds. The principles of accuracy and prudence used by Notaries / PPAT are able to minimize the crime rate of the land mafia in Indonesia.