Authentication
How to authenticate a Hermès Birkin
By the Encore Luxe specialists · Reviewed by Encore Luxe Authentication · Updated October 2026
The Birkin is made by a single artisan, by hand, over many hours. That way of working leaves traces a factory cannot easily reproduce: small irregularities that are nonetheless consistent, a particular angle to every stitch, edges built up in layers. When a Birkin arrives in our studio, our specialists look for those traces across the whole bag. This guide sets out what we check. It explains our approach and is not a substitute for an inspection by a specialist.
For general information only. Good copies can pass several of the checks below, so please have any Birkin authenticated in person.
1. Proportion and stance
A genuine Birkin stands with quiet confidence. The front and back panels sit flat, the gussets fold neatly, and the flap lies cleanly over the straps. The handles rise evenly and are a consistent height. Copies often look slightly off: a flap that is too long or short, handles that splay, or gussets that bulge.
We measure the bag against the expected dimensions for its size (25, 30, 35 or 40, with occasional rarer sizes) and check that the proportions agree.
2. Leather
We confirm that the leather is what it should be. Togo and Clémence have natural, irregular grain; Epsom has a regular, embossed grain and a lighter, stiffer feel; Swift and Box are smooth. We look at how the grain behaves at folds and edges, and whether the leather matches its stated colour for the era. Leather should smell of leather, not of chemicals or glue. Exotic leathers are examined separately and with particular care.
3. Saddle stitching
The Birkin is stitched with the point sellier, the saddle stitch, using two needles and waxed linen thread. We look for:
- Stitches that are slightly slanted, evenly spaced and consistently tensioned.
- Small, natural irregularities, the mark of handwork, that do not wander off line.
- Neat finishing at handle bases and strap ends, where the artisan secures the thread.
- Thread colour appropriate to the leather. It is often tonal, sometimes deliberately contrasting.
Machine-perfect stitching, wavering lines and loose threads all warrant a closer look.
4. Edges
Hermès edges are sanded, dyed or painted, and polished in layers. They should be smooth, even and consistent in colour, without drips, bubbles or rough patches. On older bags, honest wear to edges is normal, and we distinguish wear from poor original finishing.
5. Heat stamp
On the front, under the flap, the heat stamp reads "Hermès Paris Made in France" in three lines, set beneath a small logo on some eras. We examine:
- Letter shapes and spacing, which should be crisp and even.
- The accent on the "E" of Hermès.
- Finish: gold-toned for gold hardware, silver-toned for palladium, or a blind (uncoloured) stamp on some leathers and eras.
- Impression depth: consistent, never smudged or blurred.
6. Blindstamp
The blindstamp shows the year of manufacture as a letter, with or without a surrounding shape depending on era, alongside a mark identifying the artisan or workshop. Placement varies by era. We check that the blindstamp is present, cleanly impressed and consistent with the hardware, leather and construction of the bag. Read more in our Hermès blindstamps guide.
7. Hardware
Birkin hardware is solid and weighty. We look at:
- The turn-lock's plate, its engraving and the way it turns.
- The feet on the base: their number, their shape and how they are fixed.
- Screws on the strap plates, which should be neat and consistent with the era.
- Engraving on the padlock, the zipper pull and the hardware, which should be crisp and evenly spaced.
- Plating that shows wear consistent with the bag's overall condition.
8. Lock, keys and clochette
The padlock is numbered, and the keys carry the same number and open it. The keys sit in a leather clochette that is stitched by hand and stamped. We check that the lock and keys work together, that their finish suits the hardware, and that the clochette is made as carefully as the bag. Locks and keys can be replaced over a bag's life, and if we find a mismatch we say so.
9. Interior
The interior is lined in matching leather (chèvre on many bags) with a zip pocket and a slip pocket. We look at the zip, its pull, the stitching of the pockets and the finish of the lining.
10. Accompaniments
Dust bag, box, rain cover, care booklet and receipt are noted but never relied upon. They are some of the most copied items in luxury.
What we do
Every Birkin we offer has been examined against all of the above and more by our specialists in our UK studio, with a second specialist review. If we are not certain, we do not list the bag.
Read next: The Hermès Birkin guide · How we authenticate · Hermès house guide
This guide is for general information and is not a substitute for professional authentication. Encore Luxe is an independent retailer and is not affiliated with Hermès.
Questions we’re often asked
- How can I tell if a Hermès Birkin is real?
Look for even, slightly slanted hand saddle stitching, a crisp heat stamp that suits the hardware, a blindstamp placed where expected for the era, and heavy, cleanly engraved hardware. All of these must agree. A specialist should always confirm in person.
- Does a genuine Birkin always come with a receipt?
No. Many genuine Birkins are offered without receipts, and receipts can be forged. We authenticate the bag itself and list exactly what accompanies it.
- Should the lock and keys match the bag?
The lock and keys should be consistent with the bag's hardware finish and era, and the keys should open the lock. Locks and keys are sometimes replaced or swapped, so we note this where we find it.
- Where is the blindstamp on a Birkin?
On most Birkins it is found on the inside of the strap, or on the back of the strap where it meets the body, depending on the era. Placement has changed over time.