I am curious to know what sort of proprietary barcodes are used on the bardoces underneath the latex on LA state scratch off tickets. This barcode is readable via any barcode scanning app, and I've discovered it's a string containing the numbers on the back, save for the last 3 in parentheses, plus the number underneath the latex. However, when I try to generate them and compare to a scratched ticket, they differ slightly. I'm just curious as to how my app can read the barcode, but batch generation software can't seem to create them... I'm guessing there's a hidden "track" or something that barcode scanners can't read, save for the one on the lottery vending machine. I am writing a book where the main character prints out these barcodes, tapes them to scratched off losing tickets and scans them in the machine, as a sort of manual brute Force method to try and redeem them for free tickets, without seeming TOO suspicious. Must be a realisitc story yall. I know it's based on PDF417, BUT I need more info.