[mothered]

- and show them the evidence that the laptop went missing

What evidence are you planning to show that justifies the missing Item?

I assume that the package had the same weight as the laptop.

Yes I know, the OP stated that In his/her Initial post.

By mentioning "evidence", I was referring to what Indication will the OP provide that's consistent with a missing Item. There's no point If the package Is In a perfect (sealed) condition without any assertion of tampering.