eBay

What happens if I sell a high priced item to a customer and they haven't received it after almost 2 months still stuck in customs? I've already been paid for the item (I waited over a month) as ebay released the funds before the item was received so ...

I'm trying to ship something internationally and when I go to purchase the shipping label there's a section under custom forms I have to complete and it's asking if I know the 6 digit hs tariff code/number?