Many took to social media to complain about phishing emails addressing them by their first names and mentioning where they live.
But Domino’s insists there’s been no “unauthorised access” to its systems, although it is investigating a potential issue with a former supplier.
“It was a bit eery (sic) getting all these spam emails that somehow knew my name and suburb and initially were making it past the spam filter,” Mitchell Dale posted on Domino’s Facebook page.
“The decision to try to keep me in the dark and not announce what had happened is why I will not be ordering Dominos again.”
“Nothing better than waking up finding out your data has been breached,” Dylan James posted on Facebook.
“Why haven’t you informed anyone yet?”
In an undated statement on its website, Domino’s Australia said there was no evidence to suggest there had been unauthorised access to its systems.
“We are investigating a potential issue with a former supplier’s systems that may have led to a number of customer email addresses, names and store suburbs (related to pizza orders) being accessed,” it said.
“Domino’s acted quickly to contain the information when it became aware of the issue and has commenced a detailed review process.”
The company did not say when it first became aware of the issue and insists no financial information has been accessed.