This research article, entitled "The Legal Force of Land Sale and Purchase Receipts in Related Land Control" in accordance with the formulation of the problem, aims to analyze the legal force of land sale and purchase receipts as evidence and the basis for land ownership. This objective seeks to explain the extent to which receipts are recognized and have evidentiary force in the land and civil law systems in Indonesia. This research, based on the background and conceptualization of the problem, is categorized as normative legal research. It concentrates on content related to principles, systematic methods, and the coherence of laws and regulations. The study describes law as an element of prescriptive discipline. This research uses a descriptive-analytical method, which attempts to describe problems, conditions, or events as they are, thus revealing the actual facts. Based on the research, the Legal Force of Land Sale and Purchase Receipts as the Basis for Land Ownership. Land sale and purchase receipts are recognized as valid evidence of a sale and purchase agreement between the seller and buyer, but their legal force is limited to the relationship between the parties (seller and buyer) only. In civil law, a receipt proves an agreement and payment has been made, thus providing the buyer with the right to demand the transfer of land. However, in land administration, a receipt is not recognized as evidence of a transfer of rights that can be registered. Consequently, a receipt is not binding on third parties and does not guarantee legal certainty of ownership before other parties or the state. In the event of a dispute, a receipt serves only as initial evidence that must be supported by other evidence (physical possession, witnesses, etc.) to be recognized by a judge. The legal force of a receipt is weaker than that of an authentic deed: these private agreements are vulnerable to revocation if they conflict with formal evidence such as a certificate. Therefore, as a basis for ownership, a receipt provides informal and civil legitimacy, but does not provide full legal certainty without further formal steps.