Communication systems and methods to transmit data among a plurality of computing systems in processing benefit redemption, including a portal configured to communicate with transaction terminals, reward hosts and issues processors. In response to a reward balance inquiry from a transaction terminal, the portal communicates with a respective reward host to obtain the balance, communicates with an issuer processor to obtain a one-time use account number, and provides the transaction terminal with the balance and the account number. The transaction terminal an authorization request for a payment transaction made using the account number. In response to the authorization request being received in the issuer processor, the portal communicates with the issuer processor to identify the payment transaction and communicates with the reward host to perform a reward redemption to support the payment transaction.