The build sheet.
Proud owners frame this. Well, the fair weather posers that shine their bikes out front every weekend hoping someone will see them and tell them how beautiful it is and how lucky they are do anyway. To them I say "Get a life and stop trying to buy yourself into one!" Probably bought a dozen keychains too for the lawnmower and Barbie car etc. in the hope someone will notice and ask.
The build sheet is stapled to the crate. Sometimes the guy in shipping is so overjoyed with his position that he agrees to be paid by the staple and takes his job very seriously. If your build sheet looks like it came from target practice, then that guy packed it.