The Department of Information Technology and The Inspector General for Personal Data Protection (GIODO) organized together a conference “Legal and economic aspects of personal data processing” which was held at the Poznan University of Economics. The conference was organized in the framework of The 3rd Open Day of GIODO, a series of events celebrated each year in different city devoted to the popularization of citizens knowledge on personal data protection and processing. During the conference prof. Wojciech Cellary gave a lecture entitled “e-Privacy”, he chaired also a session on private data processing in enterprises and public institutions.