If the client has an Approved Paper Mandate or an Approved E-Mandate, he can also make the payment via that.
After the funds are added to the cart, the client can click on Pay Now -> Enter the OTP sent to the registered Mobile/Email ID -> Auto-debit Mandate
Please note: This option is available only if the client has an approved mandate. To read more about mandates -> Auto Debit Mandates (Click here)