CUA Online Banking Login, App & Support Guide

Checking your bank balance on a phone felt routine until CUA customers found the portal branded Great Southern Bank. Everything carried over, including account numbers and balances, and this guide walks through the new login process, app, support, and troubleshooting.

Online banking portal: ob.greatsouthernbank.com.au · Rebrand year: 2024 · Mobile app name: Great Southern Bank

Simple, easy to use internet banking.

Great Southern Bank website

Five key facts, one pattern: the rebrand changed the name and URL but left the core online banking experience intact.

How do I log in to CUA online banking?

1. Step 1: Go to the Great Southern Bank login page
   • Open a browser and navigate to ob.greatsouthernbank.com.au — the official Great Southern Bank online banking portal (Great Southern Bank official site).
   • Bookmark this URL; the old CUA login page now redirects here.
2. Step 2: Enter your customer ID and password
   • Use the same username and password you had with CUA — credentials carried over after the rebrand. (Great Southern Bank help centre – note this link is a duplicate, replaced below with CUA guide?)
   • If you are a first‑time user, you may be prompted to set up a username and password by verifying your identity with your date of birth and a contact method on file (CUA Guide: First Time Log In).
3. Step 3: Complete two‑factor authentication if required
   • Enter the code sent to your registered mobile number or email (CUA Guide: First Time Log In).
   • If you don’t receive the code, check that your contact details are up to date via the help centre.

The implication: the rebrand was a name change, not a system migration. Your digital access shifted to a new URL, but the underlying processes — credentials, authentication, security — remain identical.

How do I download the CUA online banking app?

For iOS: Download from the App Store

• Search “Great Southern Bank” in the App Store (App Store – Great Southern Bank). The app name changed after the rebrand; the old CUA app is no longer available.

For Android: Download from Google Play

• Open Google Play and search “Great Southern Bank” (Google Play – Great Southern Bank).

Using the app for the first time

• Log in with your existing CUA credentials.
• The app offers balance checks, transfers, bill payments, and e‑statements.

The pattern: after the rebrand, every digital touchpoint — web and mobile — now carries the Great Southern Bank name. The functionality hasn’t changed, but the app store identities have.

How do I contact CUA online banking customer service?

Phone support

• Available 24/7. The number is listed on the Great Southern Bank contact page.
• For issues specific to online banking, choose the “Internet banking” option when prompted.

Live chat on the website

• Click the chat icon at greatsouthernbank.com.au during business hours.

Email and secure messaging

• Use the secure messaging feature inside online banking for complex queries.

The trade‑off: live chat is faster for quick questions, while secure messaging provides a written record for disputes or escalations.

Why is CUA online banking not working?

Common issues: forgotten password, account locked, browser compatibility

• Forgotten password: use the “Forgot password” link on the login page.
• Account locked after multiple failed attempts: call customer service to unlock.
• Browser issues: clear your cache, disable browser extensions, or try a different browser (CUA of America Quick Fix Guide).

If the information entered does not match the account profile or is not on file, users will receive an error message directing them to contact CUA.

CUA support page

Troubleshooting steps

• Check the Great Southern Bank system status page for known outages.
• Uninstall and reinstall the mobile app if it crashes.
• Try switching between Wi‑Fi and mobile data to rule out connectivity issues.

How to report an outage

• Call customer service or use live chat to report persistent problems.

The implication: most “not working” reports are due to forgotten credentials or outdated browser versions, not a platform outage.

What is the difference between CUA and Great Southern Bank online banking?

The rebrand explained

• CUA rebranded to Great Southern Bank in 2024. All online banking services remain unchanged.
• The rebrand did not affect account numbers, balances, or terms.

Online banking features remain the same

• You can still view transactions, transfer money, pay bills, and access e‑statements.
• Two‑factor authentication, account alerts, and PayID are all still available.

New login URL and app name

• The login portal moved from cua.com to ob.greatsouthernbank.com.au.
• The mobile app is now called “Great Southern Bank” instead of “CUA”.

The pattern: the only differences are cosmetic and navigational. Behind the scenes, the same backend processes serve your accounts.

For Australian customers, the choice is simple: update your bookmark and app store, and you’re back to full access. Stick with the old CUA links, and you’ll eventually lose access to updates and support.

Frequently asked questions