When the supermarket has a 20 cent off per litre promotion do this. Go to the customer service and buy the amount you need to spend to get the discount voucher. Example $200 gift card/voucher, you will then get a voucher. After doing your grocery shopping use the voucher to pay for groceries and you will get another voucher. Essentially you receive 2 vouchers for the 1 $200 spend.
06
Aug