This study aims to find out about the practice of binding sale and purchase agreements on land rights based on notarial deeds in East Jakarta. This research is descriptive analytical with an empirical juridical approach, while the data is obtained through library research and field research. Furthermore, the data were analyzed qualitatively. From the results of this study, it will be known about the legal force of the deed of binding sale and purchase agreement of land rights made by a Notary in the implementation of making the Sale and Purchase Deed is very strong because the deed is a notarial deed which is an authentic deed and legal protection for the fulfillment of rights. the parties if one of the parties defaults in the sale and purchase binding agreement, it really depends on the strength of the sale and purchase binding agreement made, that is, if it is made with an underhand deed, the protection is in accordance with the protection of an underhand deed, while if it is made by or before a notary then automatically the deed becomes a notarial deed so that the power of protection is in accordance with the protection of the authentic deed.