I know this is an odd place to ask but figure I might get a response here. I have to mail out something to a friend internationally soon and unfortunately, the box is a dark color so writing their address directly on the box isnt going to really work. However when I go to the post office to mail things off, they have me fill out a slip with their address on it anyway. I was curious if anyone knows if because i have to fill out that slip, would me writing the address on the box itself even matter?