NRIs can deposit ₹25k in old currency after Customs approval
NRIs and Indian nationals abroad can deposit up to ₹25,000 worth scrapped notes on showing these to Customs officials at airports and get a declaration form stamped. The declaration has to be submitted at specified RBI branches. The grace window for depositing such notes for Indian nationals travelling abroad is till March 31 and for NRIs is June 30, 2017.