[mothered]

To increase the success probability of this SE you will have also to say that the package was tampered, the weight of the package is not very relevant if you just say that the contents were missing. So you can do it with whatever you want, not just light item. Right?

You can simply say that the Item was missing when you opened the box.

This has In fact happened with AirPods purchased from Amazon.

Yes. And I think isn't there any statement on any T&S which would cover the company for that.
They will have to ask you to sent the pack back and issue you a refund or replacement.

I want to try this... So this is the "missing item method".
I had thought the missing item method was the same as the partial method with the only difference that the missing item was obviously about SE just one item and the partial was for a plurality of items.

If the weight Is light enough, you can use the missing Item method on the "box and Its contents".

If not, use It on the "Item".
Clear enough?