Canada Post fucked up big time for me. I've recently won a M17 gas mask (+ bag) for my 'Nam re-enactment. Paid the money, the guy shipped it out the next day.
Fast forward two weeks. Still no gas mask in the mail. Suddenly I receive an e-mail and the guy tells me the mask came back to him with "UNCLAIMED" stamped on the box.
I check my mailbox every day. I didn't get anything - no slips, no notices, no nothing. Awesome, now I will probably have to pay the shipping cost again because some loser didn't feel like leaving a note for me.