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Here is how it works when you purchase anything at KFC you will be given a receipt, when you get home or within 3 days of your visit go to kfcfeedback.com.au and enter the details from your receipt, you will then be asked to do a short survey it will only take a few minutes, at the end of the survey you will be get a validation code write that down on the back of the receipt and then on your next visit to kfc if you spend $4.95-$19.95 you will get a free reg chips and drink, if you spend $19.95+ you will get a free large chips and drinks to enjoy.
Yeah, this has been around for a while. Some stores will also let you stack this offer with the $12 deal, but others won't. This is because the receipt makes no mention of the rules.