This article deals with the issue of property right acquisi tion from an unentitled person. It is in fact a breach of fundamental legal principle “nemo plus iuris ad alium transferre potest quam ipse habet”. Currently there is a great difference between decision practice of the Supreme Court of the Czech Republic o n one side and decision practice of the Constitutional Court of the Czech republic on the other side. Whereas the Supreme Court of the Czech Republic insists on abovementioned traditional principle, the Constitutional Court of the Czech Republic allows bre aching of this principle giving preference to a good faith of the acquirer. The new Czech Civil Code favors the conclusi...