The global counterfeit luxury goods market is worth an estimated $450 billion annually. The best fakes today are frighteningly good — they fool inexperienced buyers and, occasionally, inexperienced resellers. If you're buying pre-loved designer bags, developing a solid authentication eye is not optional.
This guide covers what to look for on the most commonly counterfeited brands. It is not exhaustive — authentication is a skill built over time — but it will keep you out of most trouble.
Louis Vuitton
The date code (now replaced by RFID chips on newer pieces) tells you where and when the bag was made. The format changed over the years: pre-1982 bags had no code; 1982–1989 used three or four digits; post-1990 uses two letters and four numbers (e.g., SD4040, where SD = France and the numbers indicate week and year). Cross-reference any code with published code guides — fakers often get this wrong.
The monogram canvas should be symmetrical. On most LV bags, the pattern is cut to align at seams. Look particularly at the front centre — an LV initial should never be cut in half. The vachetta (untreated leather trim) should be pale honey on newer bags and darken evenly with age to a rich patina.
Stitching is a reliable tell. LV uses exactly 5 stitches per centimetre on most canvas pieces. Count them. Fakes often have inconsistent stitch counts or uneven tension.
Chanel
The hologram sticker and authenticity card are the first things many people check — and the first things fakers replicate. Do not rely on these alone. The hologram number on the sticker should match the number on the card; both should match a format consistent with the bag's production era.
Chanel's quilting should be perfectly aligned. The diamonds must be even across the entire bag, with the centre of each diamond aligning with the bag's centre. The chain should feel substantial — authentics use real metal, not hollow chain that rattles.
Interior finishing is where fakes often fall apart. The inner lining of an authentic Chanel bag is clean, tight, and precisely sewn. Check that the CC logo hardware sits dead centre and is firmly anchored — it should not wobble.
Gucci
Gucci's GG canvas weave is tightly controlled. The interlocking G's should be sharp, not blurry, and the colour consistent across the bag. On counterfeit pieces, the GG pattern often bleeds at the edges or sits unevenly.
The double-G metal logo and toggle closures on authentic bags are weighty and smooth in operation. Fake hardware is often light, rough-textured, and tarnishes quickly.
Check the interior tag carefully. Gucci uses specific fonts, spacing, and manufacturing details on their interior labels — the exact details vary by era and style, so cross-reference with authenticated examples of the specific bag you're buying.
When in Doubt, Get It Authenticated
Professional authentication services — Entrupy, Real Authentication, and Authenticate First — provide reports backed by expertise and, in some cases, AI analysis of microscopic material details. For any purchase above a few hundred dollars, the cost of authentication ($20–$35 typically) is worth it.
Many consignment platforms (The RealReal, Fashionphile) authenticate in-house, providing some protection. But their error rates, while low, are not zero. For high-value pieces, always get a second opinion.