US Patent 10460303 Loss prevention in self-service retail checkout using smart alarms

Systems, methods, and articles of manufacture for performing an operation comprising receiving, from a self-checkout platform and as part of a purchase transaction for a first product, a data value of a barcode of the first product, storing an indication in a product store that the first product has been purchased, receiving a first item-specific identifier stored in a first radio frequency identification (RFID) tag associated with the first product, cross-referencing the first item-specific identifier with the indication in the product store to verify the purchase transaction of the first product via the self-checkout platform, receiving a second item-specific identifier stored in a second RFID tag associated with a second product, cross-referencing the product store to determine the second product has not been purchased via the self-checkout platform, and emitting a security notification related to the second product.