Nirav Modi, a billionaire diamond jeweler, looted over 11,400 crore rupees from Punjab National Bank through fraudulent Letters of Undertaking. Using his connections with a PNB official, Modi was able to obtain over 150 LoUs without proper verification or collateral. By the time the scam was discovered, Modi and his accomplice Mehul Choksi had fled the country. So far authorities have seized assets worth over 5,100 crore rupees, but 6,300 crore rupees is still outstanding from the largest banking fraud in Indian history. The scam highlighted weaknesses in bank security controls that allowed such large-scale fraud.