Ray Ban sunglasses have been a staple in fashion for many years. As is the case with many expensive accessories, counterfeit Ray Ban sunglasses are a common black-market item sold at a discounted price under the guise of being the real thing. Counterfeit Ray Ban sunglasses vary in quality; some will be obviously fake, but it can be difficult to distinguish between a well-made pair of counterfeit Ray Bans and an authentic pair of glasses. There are some details that you can look for to tell the difference.
Examine the box in which your Ray Ban sunglasses came. Ray Ban boxes are grey and have a distribution sticker adhered to the outside of the box. The sticker will contain information about the sunglasses, including the dimensions, model, frame number and distributor's name. If there is no sticker, or you can remove the sticker very easily, there is a chance that your Ray Bans are not authentic.
Look at the authenticity card that came in the package of your Ray Ban sunglasses. The card should be printed on high quality card stock and be free of grammatical, spelling and typographical errors.
Examine the rubber on the ear and nose pieces. Ray Ban only uses the highest quality rubber on its products, and therefore the rubber on the glasses should be flexible but durable and not feel slippery, slimy, fragile or like it could easily be removed.
Look for the Ray Ban logo "RB", which will be engraved into the side of the frame in pristine quality. Fake Ray Ban sunglasses often have the logo painted onto the side of the sunglasses, though recently, those who make knock-off Ray Bans have begun to try to imitate the engraved RB. Pay careful attention to the quality of the etching; sloppy engraving will likely be a sign of a fake pair of sunglasses.