try send him a post card to rental address...

來源: 於 2012-01-31 15:23:32 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

if there is a forwarding address, post office will send a reply to you.

then you can file and sue him with new address, otherwise, you can try people search or something similar...