To automate the redemption of offer benefits, data associating offers and payment accounts is stored in the data warehouse of a first transaction handler. If a payment account to which an offer is associated is in the payment processing network of a second transaction handler separate from the first transaction handler, the system uses a payment processor that is in both the payment processing network of the first transaction handler and the payment processing network of the second transaction handler to communicate with the first transaction handler to detect the authorization request in the payment account that satisfies the benefit redemption requirements of the respective offer and apply the offer benefit to the transaction when the authorization request is detected.