financial institution back office prompts the financial account holder to enter the predicted transaction amount of money then at the end of the authentication session 302 an alphanumeric transaction signature is generated at the financial institution back office 303 and transferred back to financial account holder this signature is specific to a particular financial transaction amount requested by financial account holder and has a limited life time set by default to a reasonable time interval sufficient enough to perform the financial transaction it should also be noted here that the alphanumeric signature can be used for only one financial transaction and can not be reused once the financial account holder is authenticated for a particular financial transaction there is still room to back off from the financial transaction to execute the transaction the financial account holder submits the alphanumeric transaction signature to a party at the point of sale merchant or a bank teller along with a financial institution epsl account number neither the alphanumeric signature nor the financial institution epsl account number contains any private personal information which could be associated with the financial account holder requesting a party at the point of sale to continue a financial transaction at step 305 a party at the point of sale initiates an authorization session with financial institution back office cpu and db in addition to the alphanumeric transaction signature and financial institution epsl account number given by the financial account holder the party at the point of sale adds a business id and an actual transaction amount of money and then sends this time stamped information sequence for authorization at financial institution back office the detailed system and method to perform an authorization.