Land and buildings record is a public register of figures and descriptive data containing information about the real estate properties, their owners or people who manage those properties. One of the many tasks of the district governor is to keep the registers of land, as well as the periodic verification of the registry data. The purpose of the article is to present examples of mistakes that occurred when making changes to cadastral data, the analysis of these mistakes, and the impact thereof on real estate transactions. The stages of creating a unified land cadastre as well as land cadastre history on Polish territory during the partitions will be explored.