As his PC has stopped working properly, it is clearly his fault that, when unpacked, mine didn't either.

That turned out to be the PSU (all that was happening was that the CPU fan was making a pathetic attempt to start up and replacing the PSU courtesy of a very nice small PC shop near here means it now works) but it does mean that the hibernation state was broken.

Which means that I can't find the PDF that came from a parcels website that was printed out just before I left for BiCon and which was used to send a parcel to Belgium. I know the parcel was collected, but it doesn't look like it arrived. And the PDF has the tracking number. One possible reason for the problem is that there's no evidence that I paid for the courier. Why I would have had all the forms before I paid is beyond me, but…

Update! It was in my browser cache. I now have the tracking number! It looks like two attempts were made to deliver it (on the Monday and Tuesday after BiCon) and it wasn't collected in the following week, so it's now coming back to me L18. I still have no evidence that I've been charged for this.