How to recognize an authentic Louis Vuitton bag by the code (and the new microchip)

Many people search on Google “how to recognize an original Louis Vuitton by the code” or “how to tell if Louis Vuitton is original”. The code, called the “date code,” was for years a reference point, but today it is no longer sufficient. In this article, we explain how the codes worked, what has changed with the new microchips, and why professional authentication systems are needed to be certain.

How to read Louis Vuitton bag codes

• Until 2021, every bag had an alphanumeric code printed or sewn inside.

• The code indicated the country and factory of production + year/month or week.

• Examples:

  • AR1004 = France, October 2004.

  • DU4168 = France, week 41, year 2018.

   

👉 This explains why many search for “original Louis Vuitton code” or “Louis Vuitton bag interior code.”

Why the code is not enough to say if it’s original

• Codes are easily replicable.

• Even a fake bag can have a consistent code.

• The absence or presence of a code guarantees nothing.

  Many counterfeiters know how to insert credible codes: this is where doubts arise for those searching on Google “how to recognize a fake Louis Vuitton”.

From code to microchip

• Since 2021, Louis Vuitton has introduced an invisible NFC microchip instead of the code.

• The chip can be read with an app, but it only shows that the chip is present, not the data contained.

• The real data are encrypted and accessible only to Louis Vuitton systems.

⚠️ Warning: some unreliable resellers say “there’s a chip, so it’s original.” In reality, a chip can be bought and programmed by anyone.

How to recognize an original bag today

• Analyze stitching, materials, logos, hardware.

• Look for a code (if pre-2021 bag) or chip (post-2021).

• Use professional authentication systems like Entrupy, the only one internationally recognized today.

Conclusion

Louis Vuitton codes tell the story of production but do not certify originality. Today, authenticity depends on professional verifications. At Aurea Luxury Lab, every bag is authenticated with Entrupy and comes only from official boutiques, never from outlets or uncertified channels.