The author presents the significant role of computerisation in the development of an efficient judiciary and administration on the example of the National Court Register and land and mortgage registers. In Poland, it is one of the biggest achievements of justice in the XXI century. The author indicates the principles of land and mortgage registers: the principle of openness of the formal land and mortgage registers, the principle of presumption of conformity with the legal status, the principle of pledge of public faith and the principle of priority rule rights enshrined. Consequently, the author focuses on the land and mortgage registers in the computer system. This solution enables direct access to the land and mortgage registers for those interested in issuing copies. What is more, access to the land and mortgage registers is possible by using the Internet (proper website). There is also presented functioning of the National Court Register in the computer system.