Systems and methods for applying a promotion to a payment transaction originating at a point of sale system of a merchant are described. Transactional information is provided to an acquirer computing system of the merchant. Based on identifying indicia associated with the transactional information, the acquirer computing system determines whether to modify the payment transaction messaging before communicating it along to an issuer computing system.

In an embodiment, methods for managing a point of sale (POS) device are provided. Inventory information may be transmitted to the POS device. The inventory information may be associated with the physical location of the merchant. An application may be pre-loaded on the POS device. The application controls a plurality of functions that are allowed to be performed at the POS device. The application may be updated to control a new function that is allowed to be performed at the POS device. A configuration right may be provided to a merchant server. The configuration right may determine an operation that the merchant is permitted to perform to control the POS device.