Here in NZ the scrappers have to mark the copper with the sellers# & transaction #.
Then they have to hold onto it for a month so the Cops can have a look at it first (just like pawnshops have to) then they pack & sell it.
Some don't bother with cars as it comes under 'second hand car dealers' & that means they have to do the registration paperwork, that takes weeks, before crushing it.