This article attempts to analyze the subjects connected bank transparency and the code of conduct relating to the proposed loan. In this area in 1997 the European Commission issued a Code of Conduct Europe, to which many European banks and the whole of Italian banks this code is adhered and till today still in force to Learn the investment strategies. This Code of Conduct known as Prospectus Information Esis consists of 15 main points, in which the customer can estimate the mortgage in all its aspects, allowing you to compare all offers mortgage. The prospectus Esis are featured First, the bank lender, the type of loan, the interest rate applied to the proposed loan, the APR, amount of the sum payable, the amortization period with the amount of the rate and frequency of payment, there are also lists all costs relating to expenses and ancillary investigation, the rules for the extinction and the addresses authorities responsible for collecting the applications for any complaints.