Woolworths customers enjoyed some not-so-everyday rewards after a technical glitch resulted in big discounts on some shopping bills.
The company says the fault affected both staffed and automatic checkout stations at supermarkets around the country and lasted for about half an hour.
Woolworths declined to give a dollar amount for the total losses but confirmed that some customers received unexpected discounts of $5 and $50.
Do you know more? Email us with information.
"For a short amount of time some customers received a discount on their shopping," said Woolworths spokesman Benedict Brook. "I'm sure a lot of people had a very nice surprise and got some good value at the checkout."
The glitch comes as Woolworths and rival Wesfarmers-owned Coles expand their coupon and loyalty programs in a bid to stoke sluggish consumer spending and grab market share.
Last month, Coles rolled out its new flybuys program, along with a my5 promotion, that allows customers to pick five items they want discounts on if they spend $50 or more.
The Woolies incident resulted from the erroneous loading of a promotion code into the chain's checkout system.