A communication glitch with ANZ's electronic services last night left customers unable to pay for groceries and restaurant bills.
A bank spokesperson said people had problems with Eftpos cards, internet banking, ATMs and the goMoney App from 8pm yesterday.
The problems were fixed by midnight, and the bank apologised to those who were affected.
Different elements of the company's technical equipment could not communicate with each other, and the machines stopped interacting, but the problems had now been fixed, he said.
Several customers took to the company's Facebook page to complain, saying they had to leave trolleys of groceries behind; others said they were stranded at restaurants because they could not pay their bills.
The spokesperson said its technical team worked frantically to fix the problem.
The glitch came on the same day ANZ reported a slight lift in its annual profit to $1.77 billion.
We are aware some customers may currently be unable to use Internet Banking, goMoney and eftpos services. We are investigating this now.— ANZ New Zealand (@ANZ_NZ) October 29, 2015