How to tell if a Gucci bag is real or fake?

You want your first Gucci bag. You browsed Ebay and got overwhelmed with all the bags listed. A bag looked identical to the one above and below it. You had eye fatigue and bought the one with the serial number. It has a serial number so, of course, it is authentic. WRONG.

A lot of authentic, contemporary Gucci bags have this style of leather tag attached inside.