[porto52]

Ah thanks, I searched for a picture of the keyboard's back side, and the S/N looked like it was the same format as what I had on the box. But it makes sense that it's not the same on the box and product.

They keyboard is around 1kg and the box is quite small, replacing the weight with something plausible might be a bit tricky.

I could order the keyboard from a shop and take all the tagged product photos/videos I need, start an RMA, then return it to the shop.

Some quick research, indicates that they don't usually ask for Proof of Destruction for these mechanical keyboards. There were a lot of people complaining about Logitech asking for PODs on reddit, none of them mentioned a keyboard.