DBS and Citibank both faced technical issues in recovering their systems despite having activated their IT disaster recovery and business continuity plans, Tan said. Specific issues that led to the delays didn’t surface during their annual tests, the minister said.
About 2.5 million Singapore payment and ATM transactions couldn’t be completed during DBS Group Holdings Ltd and Citigroup Inc.’s recent outage, causing widespread inconvenience to the city-state’s population of almost 6 million.
Up to 810,000 attempts to access both digital banking platforms were estimated to have failed during the Oct 14 disruption due to a data centre malfunction, Minister of State Alvin Tan said in response to parliamentary questions Monday. Services had only fully recovered in the early hours of Oct 15.

