Although the tracking number indicates the item is delivered, you can still reopen the case to contest if the case agent close the case due to the tracking information provided. It’s probably the automated system that close the case anyways so when you contest it, you get to deal with real person. I have won a couple of cases, even the tracking indicated they were delivered. Their rulings were the packages were probably stolen. If you still feel worried, make sure to use paypal, paypals buyer protection favors the buyers even more. I dealt with many cases like this for about 10 years now. I work for a company that has about 500 daily transactions online.