Seller
msapienza1015 did NOT have this bag authenticated by a reputable authenticator nor by someone who knows how to read Coach serial numbers.
It doesn't take an expert to figure out the the style number is incorrect for the bag and although a "correct" serial number doesn't prove authenticity, it can prove that a bag is counterfeit.
ETA: Please refer to post #1 of the thread for the information we need for authentication. The seller ID is helpful for buyers searching for listings or seller reputation. It's also help for authenticators to see if the seller has a history of selling fakes.
If you paid for the bag, request (or demand) a refund and refer the seller here.
As for Hyacinth's list of invalid serial numbers and possible fakes, it's virtually impossible to list them all. What she has posted are the more common ones, those that have been seen multiple times on fakes.
Another comment is that the seller seems to have a history of not honestly describing her items:
http://toolhaus.org/cgi-bin/negs?User=msapienza1015&Dirn=Received+by&ref=home