A method for processing a check transaction includes receiving transaction information that is transmitted by a terminal; determining eligibility of the transaction for payment via a bank account; providing an electronic authorization response that is transmitted to the terminal, the authorization response including a unique transaction identifier if the transaction is eligible for payment via the bank account; and receiving an electronic response packet that is transmitted by the terminal if the transaction is eligible for payment via the bank account, the response packet including the unique transaction identifier and a transaction decision regarding payment via the bank account.