User flow

Depending on whether your AlipayHK auto-debit service is able to execute automatic deduction from your account, you might see types of user experience.

To execute the auto-debit service, you need to go through the binding process to authorize the auto-debit service to merchants. You can also unbind the auto-debit service if you want. After the binding process, all your payments can be performed automatically by deducting the payment amount from your binding accounts. 

However, when your AlipayHK auto-debit service failed to execute automatic deduction from your account for some reason, the AlipayHK in-app payment method will be used to pay the bill.