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For some individuals, this data breach event included the Australian Business Number or Australian Company Number used when creating their Optus account.


As ABNs and ACNs are publicly available information, the risk to you is low.


Call the Australian Taxation Office (ATO) Client Identity Support Centre on 1800 467 033 between 8am and 6pm AEST (Monday to Friday) and request additional security be placed on your account. When you speak with the ATO you may also wish to enquire about enrolling your voice on their system for additional security.