Before leaving for your holiday, make sure you've covered all of these bases:
Make sure you know your PIN. Many places require PIN verification rather than a signature, so you should make sure you have set up and memorised the PIN for your CBA card.
Tell CommBank you are travelling overseas. Before traveling overseas, log in to Netbank and let CommBank know your plans. This will help protect your account security while you're away.
Activate your travel insurance. If your Commonwealth Bank credit card offers included travel insurance, make sure you activate your policy through NetBank before you leave. And if you need to make a claim, call +61 2 8907 5641.
Take note of the emergency contact details. When you're overseas, you can lock, block or limit transactions on your Commonwealth Bank credit card through NetBank or the CommBank app. You can also cancel the card and request a new one. If you want to speak to someone from Commonwealth Bank when you're overseas, call +61 2 9999 3283.