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 product's container, or an associated purchase
ticket or slip storing the transaction identifier, with the POS terminal.