Before booking shipping, list the contract, invoice, packing materials, and destination-country declaration documents required for the vehicle batch, and confirm the source and version of each item. Have the party actually responsible for customs clearance review the document checklist before booking. Whether the checklist is complete remains subject to the latest requirements of destination-country customs and authorities.
For the basic documents to prepare before booking, use What Import Documents Should Buyers Prepare in Their Destination Country? as a checklist.