Hello. I wonder if this is authentic or not... http://cgi.ebay.com/CHLOE-PADDINGTO...0QQihZ016QQcategoryZ63852QQrdZ1QQcmdZViewItem The seller guaranteed the refund if I have 2 official letters to indicate the bag is fake from 2 different Chloe shops. Is it easy to get a letter? I've never asked about the authenticity to the shop. Has anyone done that before? Could you share your experiences? Thank you!!