How do I remove a card from the Google Wallet app on my Android phone or tablet?

Remove from the Google Wallet™ app:

1. Open the Google Wallet app
2. Find the Westpac Mastercard® that you want to remove. If it isn’t the first card, swipe left until you find it
3. Tap the card
4. At the top right, tap More  > Remove payment method.

Remove from the Android Device Settings: 
If you simply uninstall the Google Wallet app, this will not disable Google Pay™ and your Westpac Mastercard® can still be used for transactions using Google Pay. You should therefore remove your Westpac Mastercard, as follows:

1. Open your Android device, open Settings
2. Tap Google Services & preferences > Settings for Google apps > Google Wallet
3. Find the Westpac Mastercard that you want to remove. If it isn’t the first card, swipe left until you find it
4. Tap More > Remove payment method
5. Follow the on-screen instructions.

For more details, go to Edit, reorder or remove payment methods - Google Wallet Help