Going cashless means you leave a trail of information everywhere. From your phone number to address and your bank accounts to your Social security number all are easily accessible and scammers easily defy security terms with the help of them. In India, UPI system, no doubt, it has robust security, not hacked once till now. But scammers continue to scam people with the information available, through call and messages. It's a kind of business here. Scammers have been trapping people by offering them some greed baits.