In the HSBC Australia Mobile Banking app:
Place a temporary block on your credit card by logging on to the HSBC Australia Mobile Banking app, selecting your credit card, "Manage account" > "Manage card", then "Card controls".
To unblock your card, log on to the HSBC Australia Mobile Banking app, select your credit card, "Manage account" > "Manage card", then "Card controls".
In HSBC Australia Online Banking:
To place a temporary block on your credit card, log on to HSBC Australia Online Banking, hover over "My Banking" at the top of the homepage, select "My Card Controls" under "Credit Card Services" and follow the prompts.
To unblock your card, log on to HSBC Australia Online Banking, hover over "My Banking" at the top of the homepage, select "My Card Controls" under "Credit Card Services" and follow the prompts.