Try to find the date code. Most fakes would put the date code where you can easily find it thinking that it is all that one looks for to authenticate an item. The date code which is hot-stamped on a leather can be found behind the wide inner pocket.
The hot stamp of the brand, LOUIS VUITTON PARIS made in France must be in 3 lines. And there should be an R in a circle on top of the LOUIS VUITTON. The color must be in red, and the “made in Paris” must be closer to the lower stitches.