HORSHAM, Ararat and Stawell Woolworths shoppers were unable to finish their grocery run for about 30 minutes on Monday afternoon.
An IT update and technical glitch hit Woolworths stores across Australia.
In a statement, Woolworths said the outage was related to an IT systems update before registers came back online by about 4.30pm.
Woolworths Group chief executive Brad Banducci said IT failures should not occur and the Woolworths group apologised to customers and staff.
The technical glitch hit about half of Woolworths' 995 Australian stores and attached BWS liquor outlets for about 30 minutes on Monday afternoon.
Some shoppers vented their frustration on social media, with one woman tweeting: "I hope (at) Woolworths are going to donate all those $1 and $2 coins we had to leave in our trolleys when they closed the stores today to a suitable charity".