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I think you're nailing it--some black hat has figured out the encoding and is making fake stamps. Same as gift card draining.



Wouldn't surprise me if the "encoding" was just unencrypted UUIDs.


That would mean there's no encoding to crack, but it could still be going on if it's an inside job. Someone has access somewhere in the production process, notes valid codes. Could be a camera hidden somewhere.


Really sounds more like Mafia interdiction of good stamps and replacement




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