Verify parts against the VIN using the accurate version. If any of model year, configuration and production batch, left/right side and connector differences, or part number supersessions and version records relies on generic information, the conclusion cannot be trusted. Check the part number together with the VIN, model year and production batch; if the supplier offers a superseding number, they should also state when the supersession takes effect. Log model year, configuration and production batch first, then confirm left/right side and connector differences. If part number supersessions and version records change, the earlier conclusion no longer applies. On completion, the person responsible for VIN matching signs off, records the dates of the documents used, and notes any exceptions that must be cleared before the next step.
For version differences, see also What is a packing list for car export?. Supply and warranty responsibility for VIN matching must be written into the contract or service agreement; a supplier's verbal assurances are no substitute for a long-term commitment.