If I were you, I would first ask if the package was damaged/or opened when he got the package, from whom/where he got the package...
Customer service is very important, do not assume buyer is a lier in the first place, even if you know your item was brand new. but what about someone else use his item before he got back from the trip?
Customer service is very important, do not assume buyer is a lier in the first place, even if you know your item was brand new. but what about someone else use his item before he got back from the trip?