After your auction ends the winner will be prompted to select whether or not an address needs to be provided(digital auctions require no address). Listia terms state auction winner has seven days to provide seller a verified address. If after seven days the winner has not contacted you, you have the right to relist auction and keep the winning credits. Most people, like myself, watch auctions they bid on during the last few minutes and promptly provide a shipping address. Then again there are times when its not convenient to do so at the time and they usually provide an address later on in the day (i.e. after work) or the day after. Hope this helps!