Essential Steps to Take If Your TFN is Lost or Stolen

Losing your Tax File Number (TFN) or having it stolen can be a serious concern. It's essential to act quickly to prevent misuse. This guide will help you understand the steps to take if you find yourself in this precarious situation. 


Understanding the Risk 


When your TFN is stolen or compromised, the risks are significant. Fraudsters may use your TFN to lodge or amend tax returns to claim large refunds. They might also alter your bank account details with the Australian Taxation Office (ATO), redirecting your tax refunds to their accounts. Recognising these risks is the first step in mitigating potential damage. 


Finding Your TFN Online 


If you've forgotten your TFN, you can easily retrieve it using ATO's online services. Access it via your myGov account or the ATO app. This method is convenient and secure. 


Alternative Ways to Find Your TFN 


In case you don't have a myGov account, your TFN can also be found on: 

  • Your income tax notice of assessment. 
  • ATO letters, such as a statement of account. 
  • Payment summaries or income statements from your employer. 
  • Superannuation account statements. Alternatively, your registered tax agent can provide your TFN. 


Immediate Action for Lost or Stolen TFN 


Report the Loss or Theft: If your TFN is lost, stolen, or accessed by an unauthorised party, it's crucial to inform the ATO immediately. In cases of suspected misuse, contact the ATO's Client Identity Support Centre for assistance. They offer advice and implement security measures to monitor your account for suspicious activities. 

Review Your Accounts: Check your tax account statements for any unusual activity or transactions you don’t recognise. 

Change Your Bank Details: If you suspect your bank details have been tampered with, contact your bank to secure your accounts. 

Preventive Measures 

Secure Your Personal Information: Always protect your TFN and other personal information. Avoid sharing it unnecessarily, especially online or over the phone. 

Regular Monitoring: Regularly review your tax records and bank statements to catch any unauthorised activities early. 

Stay Informed: Keep abreast of the latest methods used by scammers and the advice provided by the ATO. 


Protecting Your Personal Information 


The ATO also provides guidance on safeguarding your personal information. This includes being vigilant about sharing your TFN and monitoring your financial statements. 


ATO’s Commitment and Disclaimer 


The ATO emphasises its commitment to providing accurate and clear information. However, they advise seeking professional advice if you're unsure about how the information applies to you. 


Need Assistance with a Lost or Stolen TFN? 


Navigating through the complexities of a lost or stolen Tax File Number (TFN) can be overwhelming. If you have further concerns or require personalised assistance, don't hesitate to reach out to us. Our team of experts is dedicated to helping you secure your financial information and guide you through the recovery process. Contact us today for reliable support and peace of mind. 


Need help with your accounting?

Find Out What We Do
July 14, 2025
What does a “comfortable” retirement mean to you? For some, it’s travel and lifestyle. For others, it’s simply having the bills paid on time without stress. Whatever your version of comfortable looks like — the key is planning. We’re here to help!
July 14, 2025
Selling property in Australia? Don’t forget your Clearance Certificate — it could SAVE you THOUSANDS at settlement. If you don’t have one, the buyer is legally required to withhold part of your payment — delaying and reducing what you receive. Applying is free and easy — and Ascent Accountants can help you get it sorte
July 14, 2025
If your business paid contractors during the last financial year — think tradies, cleaners, and more — you may need to lodge a Taxable Payments Annual Report (TPAR). Missing it (deadline: 18 August!) can lead to late penalties. Not sure if you need to lodge or what to incl
June 12, 2025
June is zooming by! Here’s another handy checklist for business owners—let’s get you sorted for EOFY and tick off those to-dos.
June 12, 2025
EOFY is almost here. Are you ready? Now’s the time to get your finances in order and maximise your tax return. Our latest guide covers top tax deductions, super contributions & co-contributions, SMSF must-dos, PAYG instalment tips and a 30 June checklist.
June 12, 2025
Whether you're a first-time landlord or managing multiple properties, understanding what you can claim at tax time can make a big difference to your bottom line. In our latest blog, we break down the most common (and often overlooked) deductions.
More Posts