My local delivery POD photo was questioned today; how can I complete the chain of evidence?

A corporate client claimed today that they didn't receive their package. The system only had a photo of the doorway, but the angle didn't show the house number. These types of orders are usually the hardest to resolve. I first pulled the driver's GPS, scan timestamp, route dwell time, and the sign-off records for the same batch, then asked the driver to recall if a front desk had accepted it. It…