Abstract: Systems and techniques are provided for automated shopping. The system processes sequences of sensor data to identify inventory events including item identifier and a classification confidence score. The system includes logic to generate and transmit digital receipts to devices linked to subjects in response to check-out events. The digital receipts include list of items based on the items in a log of items for the particular subject. The digital receipts can include links to graphical constructs for display on the device prompting input to request changes in the list of items. The system includes logic to process refund requests in response to messages from the device for the particular subject.