I think this sums it up quite nicely:

That led to a conversation about trying to shove our packages into those tiny 2 cm slots in order to save on shipping costs. Anyway, that also led me to remember the time I sent three pinback buttons to a buyer in the States and THIS HAPPENED:
THAT IS MY ENVELOPE! With cuts and holes and yes, BURNS. Two of the three buttons had completely disappeared and the last little guy was bent up. Apparently the US postal service shoved it into another bag and slapped on a "sorry" note. First time something like that has happened and it's pretty insane. Godzilla ate my packet!
Last example - a few days ago I had an small envelope packet returned to me with a "Return to Sender" sticker with absolutely no explanation (despite there being checkboxes and a comments space). The person had scribbled I needed double the amount of postage that I had put, which was completely wrong.
More than ever I wish I had teleportation powers.