PASSENGERS flying out of Indian airports will no longer be required to carry a physical boarding pass as immigration authorities have decided to do away with the stamping of this document from September 1, officials said on Saturday. Instead, passengers travelling abroad will have to produce an e-boarding pass on their smartphones for immigration clearance, the officials told PTI. The Bureau of Immigration (BOI) under the Ministry of Home Affairs (MHA) has recently communicated the official directive to airport authorities after the agency found that the physical stamping of boarding passes for immigration purposes was causing “inconvenience” to passengers.