Abstract: A system, method, and computer-readable storage medium configured to facilitate, for example, point-of-sale check approval in real-time. The system converts a demand type payment transaction into a payment card transaction. A cardholder database contains a cardholder record. The cardholder record includes a demand account and payment card information of a cardholder. A network interface receives point-of-service transaction data. A transaction processor correlates the user with the cardholder record, and generates an authorization request message which is sent to an issuer for approval.