On May 14, 2015 MM Conferences organized in Warsaw a workshop on the functioning of consumer law in the banking sector. During this event, Mr. Sroczyński delivered a lecture entitled „Preventing the violations of collective consumer interests by the President of the OCCP in the banking sector”. In his presentation, J. Sroczyński discussed the most important means available to the President of the OCCP to protect consumers on the banking and financial markets, pointed out to practices affecting the collective consumer interests and provided examples of decisions issued by the President of the OCCP in this sector.