they won't have to send their address in an email, after they've won they will click on the auction link and then on Have It Shipped and then will put their verified address. Only send things to addresses verified through Listia. If you don't, you aren't protected in the case of a dispute. It's Listia rules. After it's over, you'll just click on the auction link under My Auctions, Ended With Winner and you'll be able to email the winner and see their address once they put it on there. They have 7 days to do this per Listia rules, and you have 7 days to ship after receiving the addy, but faster is always better. Hope this helps and welcome to Listia!