No, each user has their own random code that is paired with a UUID generated for their account. Both are needed to spend food tickets/entry passes/etc from thes

No, each user has their own random code that is paired with a UUID generated for their account. Both are needed to spend food tickets/entry passes/etc from these accounts. They are combined into a string and encoded as a QR Code. If they had their code stolen or lost their QR code (for people who don't use our app we have plastic cards that have the QR printed on one side) they could always come back to the info tent and we can look up their account and move their food tickets to a new card. That didn't happen. We had a handful of people come up and say they thought they had more money on their card. In 90% of cases they lost track (I can list off how much they spent, when and where). In very few cases it appears the vendor double-charged them (fat-fingered the "add item" button or similar) so I void those transactions and send them on their way. That's what really rankles me. Both online and in-person have ample support available that they could have availed themselves of. The Info tent for this most recent event was right by the only entrance/exit, they couldn't miss it if they had a legitimate issue.