I've only had it happen once. I checked the tracking, it said "out for delivery" at 6:12 am, then at 8:04 am, it said "processed
through usps sort facility." I was like, "...?!?!" Waited for the mail to come, my
juice was not in the mailbox. So I called the post office, gave them the tracking number, and they told me it was accidentally put on the wrong truck, and subsequently sent back to the post office. They said they would deliver it the next day, to which I replied, "Hell no, I'll come get it right now." I guess I'm a little impatient....