Pleasant_Broccoli451 OP t1_j28b77j wrote on December 30, 2022 at 10:49 AM

Reply to comment by gunny84 in Eli5: How does a product know it's paid for? by Pleasant_Broccoli451

All of them I think. But mostly grocer ystores (regular counter or self check out)

gunny84 t1_j28ct8t wrote on December 30, 2022 at 11:10 AM

I'm from Singapore and I have not seen a store with sensor at the exit. Let's say that if I paid at a counter and I leave the item there after that the cashier would call for me. Similarly if I paid using a self serve checkout as there would be staff around.

Assuming that I'm at an unmanned store it would be monitored by cameras and AI. From those that I have seen on videos after paying I would need to exit the store. If I were to leave without my Redbull like you said and return to grab another I think the system would just take it that I am performing a new transaction and flag out that I'm leaving the store with an unpaid item.