ATM card users were unable to withdraw money under the cross-banking system on Monday afternoon due to IT technical errors, resulting in payday chaos.
Weidt Nuchcharoen, senior executive vice president of Krungthai Bank, said the investigation found the problem arose from a system error at National ITMX Co, which is the system provider for the intra-bank clearing system, causing the break down of the ATM pool.
He said the system went down around noon on Monday and resumed, but became unusable again about 4pm. When the system resumed, some ATM machines showed a message saying that the service was not available. All banks faced the same problem.
Tuesday is a mid-year holiday for financial institutions and banks will use the free time to examine their databases to see how many customers did not get the money they withdrew.