So I sold something on eBay and it was supposed to be delivered about 11 days ago. Ever since then, the tracking says undeliverable as addressed. I thought it would be sent back to me but nothing. I messaged the buyer about a week ago asking if he knows what's up, but he still hasn't replied. So I don't know what to do at this point. I got insurance, so if it's lost, I can make a claim. I just don't know when I'm supposed to.