On a fake purse:
- The G's on either end of the bag wouldn't be identical/same. Also, some of the G's would get cut off. Such as something like this: (Look at the middle & everything on the left & right of it should be a mirror image.http://i17.ebayimg.com/01/i/02/e6/ea/e9_1_b.JPG
- The tags shouldn't be attached the bag itself. Like this:http://i3.ebayimg.com/01/i/02/95/4c/7b_1.JPG
This would be an example of an authentic Gucci:http://cgi.ebay.com/ws/eBayISAPI.dll...7910 304&rd=1
I hope this was a clear description of what an authentic & non-authentic bag should look like. There are other things to consider as well. What the dustbag looks like, if there's a controllato card & care card that comes with the purse.