After serving about 14 months as CEO of Paytm Payments Bank, Renu Satti has resigned to serve as COO of Paytm's new initiative 'New Retail'. Paytm is reportedly in talks with US-based investors and existing shareholder SoftBank to raise up to $500 million for the same. 'New Retail' was coined by Jack Ma, founder of Alibaba, which also backs Paytm.