I saw on this website that if your speedy came with cardboard below the handles ( flat ), its not authentic. But mine did. The SA even showed what it came with and he really showed the cardboard. Did yours too?
Most of my handheld bags with vachetta handles did come with cardboard and/or plastics. And I actually prefer that as I tend to buy my bags abroad and it helps to have additional protective covering in transit!
My SA usually 'prepares' my bags for me, but I've had one bag come with everything since it was shipped to me. My Mon Mono Speedy was sent to me from NYC boutique with all the plastic, cardboard & such.