the USPS has lost a few things of mine. my bank statement was in the hall way of the building across the street, the maintenance man gave it to me unopenned. the USPS has to investigate a lost item even without a receipt or insurance. you give them the date,time and address and they will go from there. they may come up with nothing but they do have to investigate it and get back with you. unfortunately it seems the gift may have gone to the wrong recipient and it becomes finders keepers.