500ml coke with ReTurn logo has a different barcode to a 500ml bottle without a ReTurn logo.Not sure I fully agree with you here,
The issue is not the logo or the barcode but rather that the Re-Turn machine is not giving a refund on deposit charged products because it simply hasn't been programmed to do so even though we were told at launch that it was
My understanding of barcodes is that they are unique to the product, so if a supermarket is able to update it's pricing on a given date through a barcode well then the machine that is supposed to refund us this deposit charge should be able to do the exact same using the same barcode
Same with almost every other bottle except for a small few that have international barcodes and these are small producers
My guess is it's human error in the store or human error by the supplier or human error by return that barcodes have either been incorrectly added to a pos system for the deposit to be charged or not added to the ReTurn scheme.