My personal Royal Mail horror story involves my PhD submission form which I posted to my supervisor who lives on the far side of the county - first class but not tracked/signed for. A week later it still hadn't arrived so he printed off a copy, filled in his bits, and posted it to me. A week later there was still no sign of either copy of the ruddy form so, by now somewhat panic stricken, I printed off yet another copy and wasted the best part of a day on making the return journey to his office. Both missing copies did turn up within a couple of months but I still haven't forgiven Royal Mail and I wouldn't send anything important untracked. Should have claimed the cost of the train ticket off them I suppose, to say nothing of the paper and at least one set of envelopes and stamps