Enter a random string and compare it to the message you get when entering the tracking number. They may be the same message -- I had that problem once and didn't realize until I actually called the post office to ask what it meant that their system was telling me I had a bullshit tracking number (this was a legal thing that had gotten lost somewhere).I'm not sure they even can just start seizing all your mail... can they? I mean I suppose they can do anything a court says they can, but is it really within their power to proactively seize all of your shipments like that? Seems like they'd have to at least say "this guy gets lots of drugs, let's have a dog sniff every package," or something?