The customers, their behavior on the market, reasons for undertaken actions and decisions have a great role in functioning and economical development. However, the customers are often treated inappropriately by professional service. There was presented a problematic of clients protection’s system, who are customers on the banking market services connected with insurances, mortgage credits and ethic problems. The domination of banking sector on the finance market and also the role of customers as an important clients group of this sector was taken under consideration. The topic is wide, multithreading, up to date and controversial too.