Customers of NatWest, RBS and Ulster Bank have been sharing their experiences on the ITV News Facebook page after services at the banks went down for several hours yesterday, leaving customers unable to use their credit and debit cards.
Denise Paton wrote: "Unable to get money out to buy electric and it will run out by the morning so praying they fix the problem asap because I'm electric only, so need it for everything."
Libby Field wrote: With any luck Tesco will keep hold of my shopping till they sort out their issues. I was left red faced at the tills and had Christmas presents in there for my daughter."
Gee Mix wrote: "I had some voucher codes for a discount on a few things and cannot pay online! It is going to end up that I'm going to miss out on saving money and may not be able to afford gifts now that I wanted for Xmas! Thanks NatWest.
More top news
Two people have been pulled from the sea and are being treated by paramedics on an East Anglian beach.
Jeremy Corbyn has denied allegations of bullying saying "intimidation is not allowed" in the Labour party.
A gunman who killed nine people and at a Munich shopping centre was German-born and had no links with Islamic State, authorities say.