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What do I do if my card has been lost or stolen?

What to do if your card has been lost or stolen

If your card is missing or you are concerned about fraudulent activity, you can block your card using the Citi Mobile® App,
Citi Online or by calling us.

Citi Mobile® App

  • Log in to the Citi Mobile® App
  • Tap the 'Profile & Settings' icon on the top left of the screen
  • Go to 'Cards / Accounts' section under ‘Financial Settings’
  • Tap the ‘Report lost/stolen for credit card’ button
  • Select the card you want to report missing and follow the prompts to block it.

Citi Online

  • Log in to your Citi Online account
  • Click on ‘Services’ from the top navigation
  • Select ‘My Profile’ from the dropdown menu
  • Select ‘My Profile’ again from the menu on the left
  • Select ‘Card Activation’ and follow the prompts to deactivate.

Customer service

Contact us to report a lost or stolen card immediately on 13 24 84 (or +61 2 8225 0615 if calling from overseas). We will review your recent transactions,
block your account to stop any fraudulent activity and arrange for a new card to be sent to you.


Dispute transaction

See how to dispute a fraudulent transaction

Learn more >

Help and support

Explore our online help guides and learn more about our products and services.

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Useful forms and links

See additional resources for our products and services that will help you set up and use your account.

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Support services

We are here to help you through difficult financial or personal times.

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Contact us

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