Rich,
You're right about noticing the tag, but in the case I had, the buyer was in Canada, but he had me ship to a restoration shop in MI. I think the shop may have been playing games or they just misplaced it. Either way, proof is proof, and I wasn't bothered again.
The PO sometimes does make mistakes too. One day, a neighbor gave me a package addressed to me. It had a Delivery Confirmation tag on it but was delivered to him!
Verne