For decades, the first thing anyone did with a pre-owned Louis Vuitton bag was hunt for the date code. Around 2021 that changed: the brand phased out printed date codes on new production in favour of a small embedded NFC chip. If you are shopping for a recent bag and cannot find a code anywhere, this is usually why — and it changes how you should approach the purchase.
What the date code was
The printed date code was a short alphanumeric marking stamped or heat-pressed inside the bag, on a leather tab, a lining panel or an interior pocket. It encoded production information rather than acting as a serial number, so two identical bags made in the same place at the same time could carry the same code. It was never a proof of authenticity, but it was something a buyer could see and cross-check. If you are buying an older piece, our date code guide explains how to read one.
What replaced it
Newer bags carry an embedded NFC microchip sewn into the construction. It is not visible, it is not printed, and there is no code for you to write down. Crucially, it is not something a customer can read. There is no consumer app that scans the chip and returns a verdict, and any listing or service claiming to "scan and verify" a chip for you should be treated with suspicion. The chip is a brand-side tool, readable by Louis Vuitton, not a public authentication feature.
What this means when you buy pre-owned
- A missing date code on a recent bag is not a red flag. On a bag from the last few years, expect no code at all.
- A missing date code on an older bag is a different matter and worth asking about, though heavily used interior tabs do wear until the code is illegible.
- You cannot verify a chip yourself, so for newer bags the burden shifts entirely onto everything else: stitching, hardware, canvas, interior construction, heat stamp and overall build quality.
- Receipts and provenance matter more on newer pieces than they used to, simply because one convenient checkpoint has disappeared.
- Be sceptical of sellers who invent a code for a recent bag to make a listing look complete.
The transition period is messy
The changeover did not happen on a single day across every model and every factory. Bags produced around the transition may or may not have a printed code depending on the line and the production site. Our team in Japan sees pieces from that window regularly, and we do not treat the presence or absence of a code as decisive on its own. Where a bag sits close to the changeover, we weigh the rest of the construction more heavily.
What we look at instead
On newer pre-owned pieces the checks that carry weight are the ones you can observe directly:
- Stitch count consistency and thread tension along the same seam
- Edge painting or glazing quality, applied evenly with no beading or gaps
- Hardware weight, engraving depth and how fittings are seated into leather
- Heat stamp execution and alignment
- Canvas or leather grain, alignment of pattern across panels and over seams
- Interior construction, pocket finishing and lining material
- Whether the model, colourway and hardware combination actually existed as a production piece
That last point is underrated. A configuration that Louis Vuitton never made is a much stronger signal than any code ever was.
The honest limit
No single marker proves authenticity, counterfeits improve constantly, and professional in-hand authentication is what actually settles the question. The end of printed date codes removes one convenience but does not change that principle — the code was never proof either. Anyone who told you it was has been selling you a false sense of certainty.
Where this leaves vintage
One quiet consequence is that older bags with legible codes are now the more transparent purchase, not the riskier one. A well-documented vintage piece gives you a visible marking, decades of known construction patterns and a physical object that has already survived. That is part of why the vintage market in Japan has stayed as strong as it has — see why Japan is the best place to buy vintage Louis Vuitton.
For our full inspection process, read the seven checks our team in Japan uses, or browse the Louis Vuitton collection.