e-Sanchit RN requirement: provide reference for each Invoice and Bill of Lading when filing Bills of Entry. Importers, exporters and customs brokers must quote the e-Sanchit reference number (RN) with the specified document code for every Invoice and Bill of Lading declared in the Bill of Entry at the time of filing, pursuant to the expansion of mandatory uploads to e-Sanchit and Board guidance; difficulties should be reported to the Customs office.