You can use card controls in internet banking or the mobile app to block international ATM, in-store, payWave and online purchases.
Go to Manage cards, select your card, and choose Card controls. Then simply update the international setting.
The currency that your transaction is processed in determines whether the transaction is categorised as an international transaction. For example, a withdrawal from a cash machine in Bali would be classed as an international ATM transaction, as you withdraw the funds in Indonesian Rupiah.