A multi-supplier car order needs a single primary record. Use the overall coordinator and document owner to establish the baseline, and keep the per-vehicle VIN master list and the invoice, packing and bill of lading versions in sync as they change. Build one VIN master sheet with version control held by the overall coordinator; suppliers submit their own sub-sheets only, and the invoice, packing list and bill of lading are all generated from the master. Keep the overall coordinator and document owner and the per-vehicle VIN master list on one versioned master sheet; when the invoice, packing or bill of lading versions change, update the record before signing.
The VIN fields on a multi-supplier master sheet should follow the unified identification structure defined in ISO 3779:2009. When building the master sheet, see What proof should an exporter provide before requesting final payment?. Where multi-supplier car orders involve import licensing or market access, the written conclusions of the destination country's competent authority and licensed agent at the time of processing take precedence.