Eftpos terminals across the country are back online.

This morning Eftpos New Zealand said it was experiencing technical difficulties which were stopping sales from going through, and that retailers should use manual vouchers until the system was fixed.

Paul Whiston, the head of sales and marketing at Paymark, said the issues occurred because of a power cut.

"This morning a power outage occurred in Auckland, affecting Telecom's Retail Zone connectivity, which is how Telecom connects some retailers to the payments network," he said.

"We have been advised by Telecom, that this issue has now been resolved."



He said the Paymark network was operating as normal.