New Delhi, Sept. 29 -- The Supreme Court on Monday sought the response of the Centre on a petition challenging the government's decision to introduce a Merchant Discount Rate (MDR) on Unified Payments Interface (UPI) person-to-merchant transactions over Rs.2,000. Hearing a public interest litigation (PIL) filed by advocate Anjan Datta, a bench headed by Chief Justice of India (CJI) Surya Kant said, "This is less of a legal and more of a technical issue. We need you (Centre) to state the facts on a short affidavit." The bench, also comprising justices Joymalya Bagchi and V Mohana, said that it would only like to see the legal source of implementing this charge. It said, "What is the executive scope of imposing this charge? If it is a fee, it...