Registration Law is a specialized branch of law concerned with the study, regulation, and organization of public registries in which legally significant acts, contracts, and rights are recorded, particularly those involving real property, natural and legal persons, and certain legal relationships that require public notice. Its primary purpose is to provide legal certainty to social relationships, ensuring that the rights recorded in the registries are valid, stable, and enforceable against third parties.

This field of law is based on the principle that certain legal acts must be officially registered to take full effect, such as the sale of a property, the establishment of a mortgage, the formation of a corporation, or the birth and marriage of an individual. The most common registries governed by Registry Law are the Property Registry, the Commercial Registry, the Civil Registry, the Registry of Movable Property, and other special administrative registries.