Things you should know

Overview

OnlinePay customers with merchant facilities must read the following information regarding our website requirements, 3D Secure, and your obligations as a merchant.

System requirements

The OnlinePay dashboard is best suited for browser use with resolution 1280 x 1024 or higher. It can be used with all major browsers. The OnlinePay dashboard is also supported on mobile devices.

Website requirements

Merchants who host their own websites or use third-party platforms for their eCommerce websites must follow our minimum website requirements when accepting card payments. These requirements and standards must be maintained throughout the lifetime of the facility.

See Website requirements for more information.

Surcharging

🛑
Important changes to card payment surcharging
The Reserve Bank of Australia (RBA) has announced changes to card payment surcharging that take effect from 1 October 2026. Most businesses will no longer be able to apply card payment surcharges. Learn what is changing, what it means for your business, and access the latest information at Card Payment Surcharges | Westpac

3D Secure

3D Secure is an additional security layer for online card transactions. 3D Secure provides an extra layer of protection for your business and customers for their online purchases. 3D Secure deters unauthorised card use and helps you to reduce fraudulent activity and chargebacks.

See 3D Secure for more information.

Merchants who use Shopping cart plugins must provide their 3D Secure credentials when configuring the plugin. Failing to do so may result in transactions being declined.