The U.S. Department of Justice is prosecuting a major antitrust lawsuit alleging Visa maintains a monopoly in the debit market through anticompetitive agreements and financial incentives to fintech firms. Currently in the discovery phase following a failed motion to dismiss in 2025, the case focuses on allegations that these practices limit alternative payment networks and artificially inflate fees. Read the full details from the Department of Justice at Justice.gov . DOJ presses Visa antitrust case - Payments Dive