This thesis is discuss about the implementation of the land blocking
certificate or the annotation of it in the land book and the factors that cause
the land blocking certificate in the National Land Office of Sleman. The
methodology of this research is a legal empiric research, which is legal
research that is working to see the law in the fact and how the law works in
the sociality. The result of data is searching by doing field research in Land
Office of Sleman, through interview to the speakers which is functionary of
Land Office of Sleman. All of the result of research will described and
analyzed by qualitively. Based on the result of the research, will find how
the implementation of the land blocking certificate or the annotation by
Land Office and Sleman and what are the obstacle in the implementation of
the land blocking certificate or the annotation by Land Office of Sleman.
Whether in practice is compatible with the Permen ATR/BPN No. 13 Tahun
2017.