Whether you found a possible match in the ÚZSVM list or just want to verify ownership of a specific property, basic land registry information is available for free within a few minutes.
The official free application is called Cadastre Preview (Nahlížení do katastru nemovitostí) and can be found at nahlizenidokn.cuzk.cz. It's run by the Czech Office for Surveying, Mapping and Cadastre (ČÚZK).
The basic (brief) extract is always free and usually enough to verify an owner. A full, officially certified extract with a stamp is chargeable — 100 CZK for the first page, 50 CZK for each additional page. It's issued by the cadastral office, or you can order it via a Czech POINT desk at a post office.
Via the Citizen Identity (Identita občana), the "My Land Registry" application (on portálobčana.cz) can show you a direct overview of all properties registered under your own name — useful for a quick check of your own assets, though it can't be used to check relatives' names, since logging in only works for your own identity.
First check whether your name appears in the ÚZSVM list at all.
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