V članku je opisana raziskava o obravnavi lastnine velikih lastnikov v projektu obveščanja. Oblikovan je bil vzorec sedmih lastnikov, ki jih lahko opredelimo kot reprezentativne predstavnike glede na lastnosti nepremičnin v njihovi lasti in »vrsto« lastništva. Na vzorcu teh sedmih lastnikov so bila obravnavana razmerja med njihovimi internimi evidencami in podatki registra nepremičnin ter opredeljene težave, s katerimi so se srečevali med obveščanjem o poskusnem izračunu vrednosti nepremičnin. V vzorec je bilo uvrščenih 26.792 sestavin nepremičnin, kar pomeni 0,4 % vseh sestavin nepremičnin v registru nepremičnin. Neskladja so bila uvrščena v štiri sklope, podane so značilnosti teh sklopov. V članku je predstavljena tudi vključitev zasebnega sektorja v projekt obveščanja. Rezultati analiz kažejo, da je vzrok za večino zaznanih neskladij odnos do lastnine, in sicer odnos do lastnine vsakega posameznika in naše družbe kot celote ; This article describes an examination of the property of large real estate owners in the Information of Test Property Value Calculation project. A pattern of seven owners has been made, which can be considered representatives of property, considering the characteristics of their property and the type of ownership. Based on this pattern, the relationships between their internal records and the real estate registry database have been analysed, and problems that occurred during the informing of the test property value calculation have also been noted. The pattern consisted of 26,792 constituent parts of real estate, which represents 0.4% of all the real estate parts noted in the real estate registry. Discrepancies have been divided into four sets, and characteristics of these sets have also been given. The article also presents the inclusion of the private sector in to the information process. Analysis results show that the cause of most of the detected discrepancies is the lack of responsibility of owners towards their property.