I can spot fakes for sneakers, but I assume it's the same process. Material, spotting the stitchings, logos, etc. Certain things line up, there's a certain distance between stitches and logos, etc. With purses, some are easy to spot by looking at the pattern, loose threading, discoloration, etc. Once you have an eye for it, it's pretty easy to spot cause it stands out like a sore thumb.