US Patent 7454049 System and method for intelligent currency validation

Currency is validated by comparing identifying information extracted from the currency, such as a serial number associated with the currency, to identifying information in a list corresponding to invalid currency, such as counterfeit currency. If the extracted identifying information matches identifying information on the list, the currency is deemed invalid. A photograph or thumbprint image can be obtained by a person using the invalid currency to help in later identification of that individual. Optical character recognition techniques can be used to extract the identifying information.