The Markets regulator, the Securities and Exchange Board of India (SEBI), will not allow Paytm-like 'contamination' in the stock markets, said its Chairperson Madhabi Puri Buch on Tuesday. She explained that Paytm's issues were confined to its own banking system due to the absence of a Know-Your-Customer registration agency (KRA) system, preventing broader market impact. During an event at the National Stock Exchange (NSE), Buch stressed that KRAs are essential to validate activities and prevent harmful players from affecting the entire market, ensuring that any potential problems remain contained and do not contaminate the broader system.