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  • Your identity security – get help

    If you know or suspect someone has stolen your tax file number (TFN) or is using your tax-related information illegally, phone the ATO as soon as you can.

    To get help:

    • explains how to verify or report a scam.
    • If you are ever unsure whether an ATO interaction is genuine, don’t reply. Call us on 1800 008 540 or visit
    • If you think your TFN, Australian business number (ABN), or other tax-related information was stolen or misused, phone us on 1800 467 033, Monday to Friday between 8.00am and 6.00pm.
    • If you think your AUSkey has been compromised or misused, change your password immediately and notify the AUSkey administrator.
    • If you are an AUSkey administrator you should cancel an AUSkey when you are alerted to unauthorised access, and phone us on 1800 467 033, Monday to Friday, 8.00am to 6.00pm. We will monitor your TFN for unusual activities.
    • If you think your myGov account, including your linked ATO services, was accessed without your permission, phone us on 13 28 61, Monday to Friday, 8.00am to 6.00pm.

    Cybercrime can also be reported to the Australian Cyber Security CentreExternal Link via the Cyber Issue Reporting SystemExternal Link, however all tax related security issues should be reported to us.

    You can also report identity theft and fraud to your state or territory police.

    Help to re-establish your identity

    If your identity is stolen or misused, contact our Client Identity Support Centre on 1800 467 033 (8.00am–6.00pm, Monday–Friday) to help you establish your tax identity.

    When you phone us, we'll discuss the identification documents you'll need to provide.

    If you think your other personal information was compromised, we recommend you contact IDCAREExternal Link on 1300 432 273, Monday to Friday, 8:00am to 5:00pm. IDCARE provide free advice and confidential support to victims of identity theft.

    If you hold taxpayer information

    If you hold tax and/or superannuation data (including TFNs) for your clients or employees and you know (or suspect) its security has been breached, phone us on 1800 467 033, Monday to Friday, 8.00am to 6.00pm.

    See also:

    Protect your identity

    Your TFN is used to identify you in your dealings with the ATO. Your TFN and other personal information can be used to lodge tax returns and other tax forms.

    • Only give your TFN to organisations or people who have a legitimate need for it, such as your tax agent, current employer or bank.
    • Destroy or delete your TFN from any documents before throwing them away.
    • Don't share your online passwords with others and never reply to emails with your TFN, password or other sensitive information.

    How we respond to identity theft

    The way we respond to identity theft depends on the type of situation.

    If someone else is using your TFN

    Once we've determined which activity on your tax file is yours, we'll correct the details in your account. For more complex tax affairs it may take longer for us to confirm and correct your details.

    If someone else knows your TFN but hasn't used it

    You need to tell us if the person who may have your TFN could have other personal information about you. This is so we can determine the level of risk to your account.

    If we determine your account to be at risk, we will check for any unusual or suspicious activity.

    Use by someone known to you

    If someone known to you uses your TFN, the action taken will depend on the circumstances.

    After re-establishing your identity, we will review your situation and the level of risk. We will then discuss any further action taken.

    Monitoring your tax file

    We may help protect your account by monitoring your records before any automatic processing of your tax returns.

    If a tax return has suspicious activity, we may contact you to confirm the details before processing commences.

    The security measures we apply will remain on your file until we determine there is no further risk.

    See also:

    Last modified: 01 Aug 2019QC 49587