What is proof of shipment?
Proof of shipment is documentation or online verification from the shipping company that shows a status of shipped and the shipping date, the address to which the package was sent, and official acceptance from the shipping company (for example, a postmark). It differs from proof of delivery because it doesn’t have to show that the package was actually delivered, just that it was shipped. The proof of shipment doesn’t need to show the full street address since some shipping companies don’t include this information. The city/state or zip code (or equivalent) is normally acceptable.
Proof of shipment is authentic documentation from a legitimate postal/shipping service that includes an official acceptance by the shipper, the date sent and the address to which the package was sent. It differs from proof of delivery because it doesn’t have to show that the package was actually delivered, just that it was shipped.