The services were restored on Sunday morning after a night-long maintenance break affecting both online and automated services.
OP-Pohjolla Group was involved in the service maintenance operation on Saturday night.
It was found in the morning that some customers of the bank had difficulties with some card payments.
The problem was corrected by noon and all the cards began to function correctly.
All the problems have been resolved, said the Nordea communication department at 13:30.
