I doubt Holt's will authenticate for you; besides mostly SA's at Holt's know squat. I could almost guarantee you could take a good fake Balenciaga motorcycle bag and they wouldn't know the difference.

I don't think you need to bother anyways. Today another friend of mine agreed with me it's fake. The more I look at the pics, the more it's fake. The craftsmanship is horrible. Even if Prada was to make a freebie bag to give out with their perfume, it would be made 10x better.

Have you ever asked the seller where she got it from?