Genuine sunglasses from established makers use hinges that move smoothly and hold tension, with screws seated flush and no wobble at the temple joint. Counterfeits cut cost exactly there: loose hinges, screws that sit proud or strip on first adjustment, and temples that flex unevenly. Weight is the companion clue. A fake frame in cheap alloy or low grade acetate often feels noticeably lighter than the genuine model, or oddly heavy in the wrong places where a hollow frame was filled to fake substance.
Listing photos can hide both, which is why the authentication question to ask a seller is specific: a close photo of the hinge from the inside, and the exact model and colour code from the inner temple. Sellers of genuine pairs can provide both without effort. Sellers of fakes stall, send a stock photo, or provide a code that does not match the model in the listing title.
Lens etching is the detail fakes most often get almost right. Genuine etching is crisp, shallow, and precisely placed, usually at the lens edge, with the brand mark and sometimes the model. Counterfeit etching is often deeper, fuzzier, or slightly off position, and on some fakes it is printed rather than etched and will catch a fingernail differently. Temple codes matter too: the model number, colour code, and size should match the brand's format and the listing's claimed model, and a code that belongs to a different frame is a definitive fail.
Cases and cards are the last check, not the first. Counterfeiters now copy cases well, so a good case proves nothing, but a bad one still condemns: wrong logo embossing depth, a cleaning cloth in the wrong material, a warranty card with printing errors or a generic template. The rule is asymmetric: perfect accessories do not authenticate, flawed accessories do condemn.
Before any photo analysis, read the seller. A genuine reseller of premium sunglasses usually has a history in that category, consistent pricing near market, and return terms that survive scrutiny. A fake listing pattern is a new account or an account that suddenly lists many premium brands at 40 to 60 percent below retail, with stock photos instead of photos of the actual pair and a refusal to provide specific detail shots.
The buying rule that follows is simple. Buy the seller first and the sunglasses second, prefer authorized retailers and established resellers with authentication policies, and treat a marketplace listing that cannot produce hinge photos and a matching temple code as unauthenticated, whatever the price claims. A genuine bargain and a fake discount look identical until the seller is asked for proof.
If this topic is useful, these earlier guides go deeper on connected questions: Serial Numbers Settle Arguments That Photos Cannot, The INFORM Act Raised the Floor: What Seller Verification Changed, and Counterfeit Hair Dryers and Styling Tools: Authentication Clues in Listings.
Check the hinge quality and temple movement, compare the frame weight to the genuine model, verify the inner temple model and colour codes match the listing, and inspect lens etching for crispness and correct placement. Flawed accessories, wrong case details, or a seller who will not provide close photos are additional warning signs.
No. Counterfeiters copy cases and cards well enough that good accessories prove nothing on their own. A flawed case or card can condemn a pair, but authentication depends on the frame itself: hinges, codes, etching, and materials, not the box it arrived in.
Ask for a close photo of the inside hinge, the exact model and colour code from the inner temple, and photos of the actual pair rather than stock images. A genuine seller can provide these easily, while a fake seller will stall, substitute stock photos, or provide codes that do not match the claimed model.
Not always, since genuine pairs do go on sale, but a premium model at 40 to 60 percent below retail from an unknown seller with stock photos is a strong fake signal. Price alone does not prove a fake, but it should trigger the full authentication check before purchase.