National Australia Bank Says Data Breached on 13,000 Customers

The National Australia Bank Ltd. (NAB) headquarters building in Sydney, Australia. 

Photographer: Brendon Thorne/Bloomberg

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National Australia Bank Ltd. has begun contacting about 13,000 customers whose personal information was breached in violation of its data security policies.

Data including names, dates of birth and contact details were uploaded to the servers of two data service companies without authorization, the Melbourne-based lender said Friday in a statement.