AD Code for Import-Export Business An Authorized Dealer (AD) Code is a 14-digit number issued by a bank authorized by the Reserve Bank of India (RBI). It is mandatory for businesses engaged in import-export activities in India. The AD Code is linked to a specific port or airport and is required for customs clearance of shipments. Importance of AD Code: 1. Customs Clearance: Without an AD Code, importers and exporters cannot generate a Shipping Bill (for exports) or a Bill of Entry (for imports),