The old saying goes 'The Devil gives you your relatives. Thank G-d you can choose your friends.'

You can also choose your spouse, but LW#4 had the experience of a dim-witted / negligent sister (who can't pack a laptop properly) and he still went and married and equally careless wife (who forgets a 2-week-old gadget worth 4 figures).

If this is the first time something like this happens, consider it a single data point and give the involved parties the benefit of the doubt. Cough up the $700 and be glad it was a relatively cheap way to learn the lesson (at least they didn't ship & damage something irreplaceable).

If something similar has happened before (or happens in the future), identify the trend early, get a divorce, change your identity and get as far away as possible from your poor marital choice and your costly careless relatives.

Half kiddingly, Dan