To use your ATM or debit card for online payments, first, select the 'Debit/Credit Card' option on the payment page. You will need to enter the 16-digit card number, the card's expiry date, and the 3-digit CVV number found on the back of the card. After entering these details, you will be redirected to your bank's secure page where you must enter the One-Time Password (OTP) sent to your registered mobile number to successfully confirm the transaction.
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