Following standard documents are required to be submitted to Indian Customs for Import Clearance.
Bill of Lading (Duly discharged by bank if a bank name is appearing on B/L as consignee) OR.
Cargo Arrival Notice / Freight Certificate.
Certificate of Origin
Certificate of Insurance / Inusrance Premium Receipt
Purchase Order / Indent / Contract / Proforma Invoice / Order Confirmation
Letter of Credit (If any)
Litreture / Certificate of Analysis / Test Certificate / Catalogue / Drawing / Technical Write up
GATT Valuation Declaration
Please note that the concerned authorities can call for any additional documents depending on the nature of goods and classification / notification claimed.