The never ending efficiency of the postal service. You can be illiterate, dishonest, and totally retarded and still be a carrier. In the past I've had my own problems with them. I ordered batteries for my cordless phone and the package was listed as delivered but never arrived and couldn't be located by the post office. I re-ordered them and they were listed as delivered and when I asked the carrier if she had one for me she said no. I asked her to check her pouch and there it was. They scan the packages at the truck and then forget to leave them. I handed a paid phone bill to a carrier directly and it was never delivered, so I ended up with late fees because of the morons.