Machine, methods, and program product for facilitating electronic inventory tracking and management of products through messaging over a payment network, are provided. An example includes an inventory management computer in communication with a merchant POS apparatus or terminal over an existing financial services payment network and configured to receive and process purchase transaction data associated with a product being purchased, for use by a product provider. The computer can include electronic inventory management program product configured to perform various operations including receiving a purchase transaction message sent through the payment network, storing purchase transaction data, and notifying a product provider of the purchase transaction data. The purchase transaction message can include a financial services electronic payment network compatible universal product-transaction identifier, which can be received through the POS terminal in response to a consumer or merchant interfacing the products container, or an associated purchase ticket or slip storing the transaction identifier, with the POS terminal.
