I worked at a title company and owned the escrow and documentation preparation software. At the time they used line printers to print on carbon copy forms. Each page was differently colored so the "original" was always the white top copy. Getting a new copy of the paperwork was of course expensive and only the original was accepted for certain purposes.

We had a very interesting conversation with the doc prep department when I moved everything to using high speed laserjet printers. "Which one is the original, now?" The end result was someone buying a large rubber stamp that read "Original." :-)