A method is provided for supplying data representative of transactions between a client and at least one merchant, via a banking institution. The banking institution issues a statement to the client which, for each transaction, includes a statement line containing at least one reference for said transaction and/or the merchant, and an amount corresponding thereto. The method includes a transaction phase, including: storing data representative of said transaction, in a statement server; acquiring and storing, in an illustrative data server, at least one information representative of a photograph and/or illustration representative of said merchant, called illustrative information. A supplying phase includes: creating the statement, associating to at least one of the statement lines the data representative of the transaction and at least some of the illustrative information, and/or at least one information pointing via one hyperlink to at least some of said illustrative information, called access information.