The content of the diploma thesis is the transfer of ownership with a focus on the potential pitfalls of new legislation of Civil Code. The topic is viewed from the perspective of current and new legislation, with an excursion into the concept of the issue at the European level and conception under Polish law. The aim of the diploma thesis is to compares the existing and new legislation, to define the fundamental differences in the transfer of ownership, to formulate the basic positives and negatives of the new legislation and the possible implications for the practice.