1. Method for identifying suspected counterfeit banknotes paid into an automatic teller machine, wherein banknotes to be paid in are checked for authenticity on the basis of data from a sensor device, comprising the steps of: linking data from the sensor device for the suspected counterfeit banknotes to an identity of a payer, storing the data concerning the suspected counterfeit banknotes and the identity of the payer, generating checking data for the suspected counterfeit banknotes by means of the sensor device, wherein checking data are generated by the sensor device for one or more of the possible positions of the suspected counterfeit banknotes, comparing the checking data with the stored data concerning the suspected counterfeit banknotes and determining the data concerning the suspected counterfeit banknote which has the closest agreement with the respective checking data, and identifying the respective suspected counterfeit banknote using the identity of the payer which is linked with the closest agreement to the data concerning the suspected counterfeit banknote.