| CPC A47F 9/048 (2013.01) [G06Q 20/18 (2013.01)] | 18 Claims |

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1. A self-service checkout system, comprising a processor and a non-transitory computer-readable storage medium comprising executable instructions, that when executed by the processor, cause the processor to:
receive a message from a vision system that includes a list of identified items on a tray positioned adjacent to the vision system for a current transaction and one or more issues related to an identification of the items on the tray;
process the message to identify the one or more issues related to the identification of the items on the tray;
provide a user interface for a customer to correct the one or more issues related to the identification of the items on the tray;
completing the current transaction once the issues related to the identification of the items on the tray are corrected; and
wherein the message from the vision system includes a heartbeat field that, when set as active, provides an indication that the vision system is active and that any other information in the message is to be ignored.
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