Paytm CEO Vijay Shekhar Sharma tweeted 'it's deliberate' in response to a user who complained OTP is at the end of Paytm's messages and requires customers to open the text. "Whenever fraudsters call gullible customers, it's very easy for them to share OTP," tweeted Sharma. "Just so that they don't share OTP, we put it at the end," he added.