- 83 updates
In one fake email, which purports to be from RBS chief Stephen Hester, customers are asked to upgrade their information as part of a "security upgrade".
A link in the email leads to an "incredibly realistic" replica of the NatWest webpage, which enables fraudsters to steal their money.
RBS Group, which owns Natwest and Ulster Bank, is directing all urgent requests to the following helplines.
RBS has said it successfully updated all but 1% of NatWest and RBS account balances overnight.
RBS Group has had less success sorting out the delays experienced by Ulster Bank customers, but it hopes to restore a full service for the start of next week.
Customers experiencing delays are being directed to this Frequently Asked Questions page or advised to visit their local branch.
Royal Bank of Scotland has cancelled a one-day golf tournament in Scotland tomorrow, in the wake of an IT meltdown, after it had just announced postponing its corporate hospitality at Wimbledon. The tournament was due to feature golf legend Jack Nicklaus at Gleneagles.
An RBS spokeswoman said that sponsorship of sporting events is unaffected.
Royal Bank of Scotland has cancelled its corporate hospitality at Wimbledon this year, in the wake of an IT meltdown which left thousands of customers without access to cash. The bank said in a statement:
The Royal Bank of Scotland has learned the lessons of the recent computer meltdown that left millions of customers unable to withdraw their money, Treasury Minister Mark Hoban said today. Speaking to the Commons, he said that he had spoken to RBS chief executive Stephen Hester.
Mr Hoban said: "I know that RBS are very keen to learn the lessons from these problems and put in place contingency arrangements for the future."
He said those who have lost money because they have been unable to access their funds should write to the part-state-owned bank with their claim.
A Financial Services Authority spokesman said the regulator expects a "full explanation" from the Royal Bank of Scotland, once it has sorted out customers' problems, over the IT meltdown which left thousands of customers without access to cash.
A spokeswoman for the Financial Ombudsmen Service (FOS) said it would "take time" before customers see the issues put completely right and she urged people to keep a record if they have found themselves out of pocket.
She said the sheer numbers of people affected were one reason for the process taking a while, adding: "They will have to look at each individual situation."
People can complain to the FOS if they cannot work problems out with their bank. The FOS said it is not currently dealing with complaints on the issue as the bank must look at them in the first instance.
The ombudsman, which receives several thousand calls a day generally, said that roughly around 10% of the calls currently being dealt with by its helpline relate to the RBS issue.
In a hearing with the Treasury Select Committee, Sir Mervyn said the Bank had been in close contact with management at RBS since the problem arose, and over the weekend.
He said the issues were technical and not a reflection of funding issues at the bank, which is 80% state-owned.
Sir Mervyn said the problems seen at RBS provide a reminder of how systemically important banks are and confirmed the need to ring-fence retail operations from investment banking.
RBS and NatWest have around 15 million accounts between them, but it is still unclear how many were affected by the disruption.
A spokesman for RBS Group said it may "never know" the exact figure as it was not possible to tell when everyone is expecting money to be paid into their account and some people may not have noticed problems.
Ulster Bank has estimated that about 100,000 of its customers have been caught up in the problems, which have meant that customers' balances have not been updating properly and their wages have not shown up in their accounts, although the money is "in the system".
Latest ITV News reports
The bank said "We appreciate the patience that has been displayed".... let me inform them, that patience has run out.
The chief executive of NatWest's owner RBS, has said that "a corner has been turned" as it deals with the fallout of an IT meltdown.