UPS lost four of my packages when I shipped most of my belongings home from college last year. Long story short, they had managed to switch the labels on four of my boxes with four other random boxes in their sorting facility that ended up getting shipped to my house instead. Naturally, since the labels were switched, the entire situation was a clusterfuck since the tracking numbers I was given did indeed match the four packages that were delivered. After about two weeks back and forth on the phone with UPS, talking with everyone from the driver that picked up my boxes to the manager at the sorting facility that processed them, UPS finally located all four in the original sorting facility. I was very lucky to see my belongings ever again.