Stopping an ECS debit in HDFC Bank can be done through NetBanking or by visiting a branch. For NetBanking, login, go to "Bills and Payments" and "Standing Instructions," and choose the ECS mandate to stop and confirm cancellation with an OTP. Bring your ID and debit card to a branch, inform a representative you want to stop an ECS debit, provide details about the biller, and they'll process the cancellation. Remember to stop the mandate a few working days before the next debit to avoid it going through.
