[copscalled]

A rock that weighs approx the same amount of the item you're trying to box is fine

And when they open the package to place the Item back In their Inventory, the SE Is an Instant failure.

Just be persistent with "No, I put the item in there, sealed... This is bullshit"

"The package might have gotten stolen in transit"

All of those work for me, In all honesty, you will get what you want if you're persistent.