Reporting back - just tried the red Westfield card at Woolworths Warwick (WA) which isn't within bull's roar of a Westfield, and YES it worked. Used the self-service checkouts, swiped the card - didn't have to select an account, "Gift Card Redemption" flashed up on the EFTPOS terminal screen and then it just asked for the PIN. The receipt also shows "Gift Card Redemption" and "Savings" as the account. As per SydneySwan's experience at Coles, the receipt doesn't show the remaining gift card balance, but I can live without that LOL.