Ulster Bank says all services should now be back up and running after technical problems yesterday.
Account holders reported experiencing problems with online purchases and card transactions.
The bank has apologised for the inconvenience and says no customers will be left out of pocket as a result of yesterdays problems.
in a brief statement this morning the bank says
"The systems issues that affected our customers last night have now been resolved and all our services are now back working normally.
"We would like to apologise to our customers. If anyone has been left out of pocket as a result of these systems problems, we will put this right.
"If any customer is experiencing issues this morning, they should get in touch with our call centres or come into our branches, where our staff will be ready to help."
