Why is there a 1.95% handling fee with my HKD transaction?

If the Multi-Currency Transaction function is not activated, cross-border HKD transactions (including refunds) will be treated as overseas transactions and a 1.95% fee will apply under the Card Service Fees table.
You may activate the function via Cards > Multi-currency Transactions. Payments made in a supported currency and settled in the same currency will enjoy a waiver of the 1.95% fee.