What makes proof of delivery actually hold up?
Evidence captured at the moment of delivery, attached to the record automatically, and impossible to add later. A photograph emailed the next morning proves someone had a photograph, not that the delivery happened when and where it was claimed.
Captured, not submitted
The difference matters. Evidence the courier collects as a required step of completing the job is captured. Evidence they send afterwards, from their own gallery, is submitted, and submitted evidence can be taken anywhere, at any time.
The same applies to timestamps. A time recorded by the system when the photograph was taken means something. A time typed into a form does not.
Corroborated
One signal is a claim; several that agree are evidence. A photograph plus a location within a few metres of the delivery address plus a route that arrives there is difficult to fabricate and easy to check.
This is also what protects the courier. A courier who did the job properly has a record proving it, which matters more to them than it does to you.
Retained long enough to be useful
A claim may arrive days later, and a chargeback considerably after that. Evidence deleted on completion is evidence you do not have when you need it. Decide a retention period, state it, and keep to it. Data protection law expects you to know how long you hold things and why.
Scorto makes the photograph a required step of completing a delivery, records the time and location at capture, and attaches all of it to the consignment permanently rather than to a courier's phone. Retention periods are published on the trust page.