A "legitimate interest" in inspecting the land register is given if you can present factual reasons for the desired inspection which make the pursuit of unauthorized purposes or mere curiosity appear impossible. Therefore, for example, creditors of the property owner who intend to foreclose on the property or prospective buyers with whom the property owner is already in negotiations may inspect the land register.
In order to demonstrate the justified interest in inspection, concrete facts (and not just sweeping assertions) must be presented and supported by appropriate documents that allow the land registry to weigh them up. If there are doubts, the land registry can demand that the facts be substantiated (Section 31 of the Act on Proceedings in Family Matters and in Matters of Voluntary Jurisdiction - FamFG).
Certain inspectors who need to inspect the land register particularly frequently for professional reasons (e.g. public authorities, notaries, credit institutions) may be admitted to the so-called automated retrieval procedure, which enables online retrieval from the land register, if the legal requirements are met.