我是請朋友去old address那兒去問的，現在住那兒的人說沒有收到。如果說是退回了還好了，現在不知道是怎麽回事，
-Try to find who signed the confiramtion sheet using the tracking number. Or ask your friend in US to call USPS to find who signed the confiramtion sheet and it is easy to find who signed it in US by calling.
