A system and computerized method of processing a rebate claim from a purchaser comprising means for or steps of receiving and storing: (a) personal information about the purchaser, including an account identifier associated with a designated account, (b) promotion information comprising one or more promotional offers associated with one or more promoted products, (c) purchase information corresponding to the at least one purchase transaction in which the designated account was used as an instrument of payment. Purchase information is associated with the purchaser using the designated account identifier, the rebate claim is validated, and the collective value associated with the rebate claim is provided to the purchaser. One embodiment may comprise means for or a step of receiving an instruction from the purchaser via an online user interface prior to the end of a qualifying period authorizing completion of rebate claim processing.