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IT error causes changes in Bank Mandiri customer accounts
Many customers said they found more funds in their accounts, but others said they found less following a failure of Bank Mandiri's information technology system.
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A customer makes a transaction at a Bank Mandiri ATM in Central Java. (tribunjateng/File)
M
any customers of state-owned lender Bank Mandiri are complaining about transaction failures after attempting to use ATMs on Saturday morning.
Many said they found more funds in their accounts, but others said they found less.
Bank Mandiri corporate secretary Rohan Hafas said the failures occurred because maintenance of the ATM system had not taken place smoothly. He explained that every midnight the bank processed the reports of transactions that occurred during the day.
“As an example, if you had Rp 100 in your account and you withdrew Rp 10 on that day, your account the system would record your account as having Rp 90,” he said as quoted by kontan.co.id over the weekend, adding that after recording the transactions the bank backed up the data.
While that was being done on Saturday, he explained, the data became corrupted, altering the accounts of about 1.5 million people, 10 percent of the bank's customers.
“The solution was actually simple, namely to adjust the accounts in the system,” he said. However, he added that Bank Mandiri had not yet done that because the bank wanted to check the customers’ data and it needed two hours to upload the real account balances into the system.
Currently the bank is blocking the accounts of 2,670 of its customers who overdrew funds during the computer system failure.
Rohan said that on Monday the bank started to contact the owners of the accounts to discuss the issue. He said he believed Bank Mandiri had managed to get back the money that had already been overdrawn. (bbn)
