Mine didn't come with one. I wish they did though, cuz I actually use a prada dust bag for my chanel wallet when I carry it in bags with a lot of junk.
Thanks for the info miffy! I would like to use a dust bag for when I have a lot of stuff in my purse. It doesn't hurt to have extra protection. I wonder if I could get the SA who helped me to give me one. Can they do that?