Payment Receipt - Sparkling
Here is how it works in the Cafeterias : 1. People pay using Zeta 2. Show the payment receipt at the counter 3. Collect food
Lately, we encountered a problem where some 'smart folks' would collect food from the vendors by showing screenshots of their older receipts π
So here's what we did : 1. Experimented with a lot of motion to make the receipts screenshot-proof. 2. Ensured that a live receipt is distinguishable from a screenshot from a distance of 10ft.
Here is one of the variants π
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