What would you do ?

[packs]

I haven't been in this situation as the seller but I have been in a similar situation as a buyer and can share how that seller handled things.

I purchased a very inexpensive ($180) item from a major auction house that I had previously spent over 10K with over the years. The item never made it to me but showed up as "delivered" in the postal system. However, this item did not carry any kind of signature confirmation and there was no way to prove delivery other than a person marked it as delivered.

The AH refused to refund me because "it was delivered" and when I asked them why THEY didn't purchase signature confirmation, they said it was because the item wasn't high value enough and effectively made it MY problem.

I will never purchase anything from them again.

However, in this situation a person DID sign for the item, acknowledges they received it, the postal service acknowledges there were no issues with the package at any point, so I don't think you have any obligation or that there is anything necessarily to "right" about what happened, especially since this person isn't even sure there is a problem by refusing to look in the box.