Slovak Land Fund published a list of unknown owners
Slovak Land Fund has published a list of unidentified owners. See if the land is also registered to your deceased ancestors.
dodatočné konanie o dedičstve
[2023] How to File a Request for Additional Inheritance Proceedings in Slovakia?
If the inheritance proceedings have already taken place, but you find that the deceased is still registered as the owner (e.g. in relation to the land), you can file a petition for supplementary inheritance proceedings.