During the Alternate 1985 sequence of Part II, Marty stands before the courthouse which is now Biff's Pleasure Palace and learns of Biff's rise to power from a video playing outside the entrance of the Biff Tannen Museum.  The tickets for the museum are not visible on-screen as currently edited.

Biff Tannen Museum ticket personally signed by actor Tom Wilson aka Biff Tannen.  I believe this ticket is a replica but the autograph was obtained in person.  I now have an original ticket.  They look the same except that the ink is crisp and black from offset printing.