I know some people here have experience with UPS so I need your help. I had a package that was supposedly delivered and left at my front door according the UPS tracking website. I got home, and the package was not there. I don't know if signature was required or not. The value of the package was almost $8,000! Is UPS responsible??? I can't believe they would leave a package at my door worth $8,000 without getting a signature.