The subject of the study is the realization of real estate, which is not examined in the traditional way but within the scope of the implementing law, but as a legal institution affecting several jurisdictions, focusing on the ownership of the auction buyer. In addition to the method of obtaining ownership based on the official auction, it analyzes in detail the possibilities of obtaining from the non-owner in the official auction and in the light of the judicial practice, the legal effects of registering the enforcement right and the note are taken into account.