Registration - API Direct Debit uses to register Direct Debit transaction created for the first time.

Payment - API Direct Debituses to proceed the Direct Debit payment process.

Status Inquiry - API Direct Debit uses to check the success Direct Debit transaction status.

Notification - API Direct Debit uses to check the ongoing Direct Debit transaction status.

Cancel - API Direct Debit uses to cancel the ongoing Direct Debit transaction.