That's the first thing I check for when buying from retail store, boutique -- is there the authenticity card, the care booklet, dust pouch. Then inspect for any flaws, defects.
Nothing you can do at this point about the missing card, but this won't happen to you again. BTW, if you store your purse in the box, you really don't need the dust pouch. Just keep the chains away from the leather by wrapping them in tissue paper. Leather likes to breathe.