Just found a flyer at Coles chatswood Westfield. 5% off total bill over $30. Excludes gift vouchers. Barcode is reusable. I notice its the same on each flyer. Expires 29th November. Scan the picture at checkout. Flyers are at service desk if you really want a physical voucher.
This is an ongoing promotion while the renovations are happening. It's compensation for the extra hassle. Been this way since renovations started and will continue until renovations are finished.
For others reading this, you don't need to take anything with you because every checkout operator automatically scans a 5% off code without you even asking.