“Every New Zealander has a vital role to play in shaping the future of grocery shopping in New Zealand, and so it’s important that they all feel they can share information with the commission safely,” van Heerden added.
The Commerce Commission said it would be open to examining instances where major supermarkets might be using their power unfairly.
It said the whistleblower tool could also be used to raise concerns about threatening or intimidating behaviour against other parties.
The commission said it would also be interested in looking into possible breaches of the Grocery Supply Code or the Grocery Industry Competition Act.
The new Anonymous Reporting Tool can be accessed through an existing complaints page at https://comcom.govt.nz/make-a-complaint.
It said a similar system had been offered since 2018 to report alleged cartel conduct.
The Grocery Industry Competition Act came into force on July 10, 2023, and gives the Commerce Commission powers to monitor and regulate the grocery sector.
The Grocery Industry Competition Act came into force last year.