The point of reviewing the post-impact underbody assessment is to make the material, the physical vehicle, and the responsibility milestones line up. The impact location, the enclosure deformation, and the diagnostic result should share one version baseline, and when an update appears, keep the old version and explain the change. Releasing immediately because the enclosure shows no cracks is a clear hold point, so do not continue payment or delivery before the correction and re-check are done. This vehicle export process guide is worth reviewing before post-impact underbody assessment begins, to settle where responsibility ends. Responsibility negotiation and vehicle repair for the post-impact underbody assessment can be recorded in parallel, and the case closes only when both are finished.