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When you’re shopping with participating online retailers, eftpos Secure, Visa Secure and Mastercard Identity Check ™ services work with Westpac to authenticate your transaction using a 'One Time Password' to help ensure that it’s really you making the purchase. This additional layer of security is provided to you free of charge through Westpac’s Added Online Security service.


How it works

From time to time, we may need you to enter a unique, randomly generated ‘One Time Password’, which you’ll receive via SMS or email, when purchasing online with participating merchants.

Please make sure that you and any additional cardholders linked to your account provide the most up-to-date mobile number and/or email address.

Note: The 'One Time Password' is only valid to use for a single transaction.

Updating your contact details

To ensure we have your most recent mobile phone number and email address, simply update your details by any of the below methods:

  • Signing into the Westpac App
  • Signing into Westpac Online Banking1
  • Contacting us by calling the number on the back of your card, or
  • Visiting your nearest branch.

If you don't provide us with a correct mobile number or email address, you may not be able to proceed with your online transaction at participating retailers.

Travelling overseas?

If you’re travelling overseas and are unable to access your Australian mobile number but you have a temporary overseas mobile number, let us know by calling the number on the back of your card.

You may need to receive a ‘One Time Password’ via SMS in order to verify your online transaction.  This SMS can be received using your temporary overseas mobile number.

Like more information?

Things you should know

1. You must be registered for Online Banking before you can use Online Banking to update your details.

Before registering for or using Online Banking please read the Westpac Online Banking Terms and Conditions (PDF 555KB) at

Mastercard® is a registered trademark, and Mastercard ID CheckTM is a trademark of Mastercard International Incorporated.