The document discusses various certificates required for shipment of goods internationally. These include mate receipts issued upon loading of cargo, shipping bills which are required to obtain customs permission for export, cart tickets with vehicle details, certificates of measurement if freight is based on volume rather than weight, bills of lading which serve as receipts and contracts of carriage, and airway bills for shipments by air that contain similar details as bills of lading. Compliance with import requirements and providing the necessary certificates ensures smooth transport of goods to their destination.