According to information provided by the South African director of Currencies Direct, Graham Barratt at MyBroadband, last week Bidvest Bank said that an "individual incident" related to online platform its banks, he reported sensitive information its customers, including names, account numbers and bank balances.
Bidvest Bank has learned about problem in early September and fixed it a few days later.
A Bidvest Bank spokesman told MyBroadband that they had investigated the matter and their evidence showed that the incident was neither a security breach nor a technical security flaw.
"It simply came to our notice then access in data due to manual processing error ", said the representative of Bidvest Bank.
"Since then this has been corrected and the necessary internal measures have been taken."
Currencies Direct customers then received a "data breach" alert from Bidvest Bank.
Barratt told MyBroadband that he was notified of the data breach by Bidvest Bank on Friday, November 9 - about two months after it was discovered.
"No direct trading system has been breached and we are currently working with Bidvest Bank to fully understand and rectify the impact of this incident," Barratt said.
MyBroadband asked Bidvest Bank about data that have been violated, but did not answer this question.
He will also not comment on whether he followed the Personal Information Protection Act (POPI) after being notified of this data breach. Instead, Bidvest Bank told MyBroadband that "it has nothing else to add at this point."