I have bought a fake Ray ban online below are the following reasons,
1. Markings - really different from original and has a diamond mark
2. Retail box - No printed label in the box
3. Carry case - Ban logo was so fake and has a sticker made in china
4. Left temple - no MODEL NUMBER!
5. Temple screw - really different!
6. Nose pad logo - NO LOGO!
7. Nose Bridge logo - NO LOGO!

I bought it online at http://www.b***.xyz/ saw the ads thru facebook. I was really disappointed with the product!