Supermarket operator Foodstuffs has apologised after a glitch meant shoppers at nearly 70 North Island stores were over-charged for their groceries.
Around a quarter of this week's specials failed to register at checkouts, a fault which was first picked up yesterday morning.
It meant last week's specials were left in place.
"As soon as the technical issue was identified around 5.30 (yesterday) morning, our IT team investigated and the checkout prices were corrected progressively between 10.30am and 12.30pm," Foodstuffs Head of Corporate Affairs Antoinette Laird told 1 NEWS.
"Pricing issues, such as this one, are extremely rare and we have systems and processes in place to identify them early.
"We sincerely apologise to any customers who shopped with us in North Island (yesterday) morning and didn't receive the correct special price they were expecting at checkout."
Customers who think they may have been affected are encouraged to check their receipts and contact their local store.
The company operates Pak'n'Save, New World and Four Square stores throughout the country.
The supermarkets impacted are below:
Albany Pak'n'Save
Botany Pak'n'Save
Cameron Road Pak'n'Save
Gisborne Pak'n'Save
Glen Innes Pak'n'Save
Kapiti Pak'n'Save
Kilbirnie Pak'n'Save
Levin Pak'n'Save Mini
Mangere Pak'n'Save
Mt Albert Pak'n'Save
New Plymouth Pak'n'Save
Ormiston Pak'n'Save
Palmerston North Pak'n'Save
Papamoa Pak'n'Save
Silverdale Pak'n'Save
Tamatea Pak'n'Save
Taupo Pak'n'Save
Te Awamutu Pak'n'Save
Wairau Pak'n'Save
Westgate Pak'n'Save
Whakatane Pak'n'Save
Whangarei Pak'n'Save
Birkenhead New World
Dannevirke New World
Hastings New World
Havelock North New World
Inglewood New World
Levin New World
Marton New World
New Lynn New World
New Plymouth New World
Ngaruawahia New World
Otaki New World
Papakura New World
Rototuna New World
Southmall New World
Taihape New World
Taumarunui New World
Te Puke New World
Te Rapa New World
Victoria Park New World
Waipukurau New World
Warkworth New World
Westend New World
Whitianga New World
Balmoral Four Square
Blagdon Four Square
Botany Junction Four Square
Eastbrook Four Square
Ellerslie Four Square
Foodworld Four Square
Fordland's Four Square
Hillcrest Four Square
Hobsonville Four Square
Kaiwaka Four Square
Matarangi Four Square
Martinborough Four Square
Matakana Four Square
Ngatea Four Square
Ngongotaha Four Square
Shannon Four Square
The Lakes Four Square
Waiau Pa Four Square
Welcome Bay Four Square
Waverley Four Square
Riverview Four Square
Castlecliff Four Square
Cape View Four Square
Silverdale Four Square
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