You’ve just scored a gorgeous Louis Vuitton bag from a consignment shop or an online reseller. You’re thrilled, but then a nagging thought creeps in: is it authentic? One of the first things seasoned buyers do is flip the bag over, peer inside a pocket, or squint at a hidden seam to find that tiny stamp—the date code. If you’re new to the luxury game, this little string of letters and numbers can feel like a secret code from a spy movie. But don’t worry: once you know what to look for and how to read it, checking a Louis Vuitton date code becomes a straightforward, even fun, part of the authentication process.

What Exactly Is a Louis Vuitton Date Code?

First, let’s clear up a common misconception. A Louis Vuitton date code is not a serial number. Unlike a serial number, which is unique to each individual item, a date code tells you when and where the bag was manufactured. Think of it as a birth certificate for your handbag—it reveals the factory location and the week and year of production. Louis Vuitton started using these codes in the early 1980s, and they continued until March 2021, when the brand quietly phased them out in favor of microchips. So if you have a pre-2021 bag, it should have a date code. If it’s newer, it likely won’t—and that’s perfectly normal.

The code is typically composed of two letters followed by four numbers, though older bags might have three or four numbers instead. The letters represent the country or factory where the bag was made, while the numbers indicate the week and year of production. For example, a code like “AR1220” means the bag was made in France (AR) during the 12th week of 2020. Simple, right? But there are nuances, and that’s where most people get tripped up.

Where to Find the Date Code on Your Louis Vuitton

Louis Vuitton is notoriously sneaky about where they stamp these codes. They’re never in plain sight—you have to do a little digging. The location varies depending on the style of the bag, but here are the most common spots to check:

• Inside the main compartment: Look along the side seams, especially near the top edge or bottom corner. On many classic styles like the Speedy or Neverfull, you’ll find it stamped directly on the interior lining or on a leather tab sewn into the seam.
• Inside a pocket: Check the interior zippered or slip pockets. The code is often stamped on the fabric lining inside the pocket, or on a small leather patch attached to the pocket’s interior.
• Under the flap: For bags with a flap closure, like the Alma or the Pochette Métis, lift the flap and look near the edge or along the stitching. Sometimes it’s on the leather tag that holds the lock.
• On the exterior leather tab: Some bags have a small leather tab on the outside, often near the top handle or on the side. This tab might be stamped with the code, but it’s rare—usually, it’s hidden inside.
• Behind the date code patch: On some older styles, there’s a separate leather patch that says “Louis Vuitton” on one side and the date code on the other. You might need to gently lift the patch to see it.

Pro tip: use a flashlight and a magnifying glass if you have one. The stamps can be tiny and faint, especially on older bags where the leather has softened or worn over time. And never force anything—if the code is hard to find, it’s likely just well-hidden, not missing.

Decoding the Letters and Numbers

Once you’ve found the code, it’s time to crack it. The two letters at the beginning tell you the factory location. Louis Vuitton has factories all over the world, but the most common ones you’ll encounter are:

• France: A0, A1, A2, AA, AN, AR, AS, BA, BJ, BU, DR, DU, FL, LA, LO, MA, MB, MI, MO, NO, RA, RI, SA, SD, SF, SL, SN, SP, SR, TA, TH, TJ, VI, VX
• Spain: BC, CA, CR, GI, LB, LM, LO, LW, MA, OB, PO, RC, SA, SL, SN, SP, SR, TA, TC, TD, TG, TH, TJ, TO, TP, TR, TS, TT, TX, TY, TZ, UB, UC, UD, UE, UF, UG, UH, UI, UJ, UK, UL, UM, UN, UO, UP, UQ, UR, US, UT, UU, UV, UW, UX, UY, UZ, VA, VB, VC, VD, VE, VF, VG, VH, VI, VJ, VK, VL, VM, VN, VO, VP, VQ, VR, VS, VT, VU, VV, VW, VX, VY, VZ, WA, WB, WC, WD, WE, WF, WG, WH, WI, WJ, WK, WL, WM, WN, WO, WP, WQ, WR, WS, WT, WU, WV, WW, WX, WY, WZ, XA, XB, XC, XD, XE, XF, XG, XH, XI, XJ, XK, XL, XM, XN, XO, XP, XQ, XR, XS, XT, XU, XV, XW, XX, XY, XZ, YA, YB, YC, YD, YE, YF, YG, YH, YI, YJ, YK, YL, YM, YN, YO, YP, YQ, YR, YS, YT, YU, YV, YW, YX, YY, YZ
• Italy: BC, BO, CE, FA, FO, MA, OB, RC, SA, SL, SP, TD, TO, TP, TR, TS, TT, TX, TY, TZ, UB, UC, UD, UE, UF, UG, UH, UI, UJ, UK, UL, UM, UN, UO, UP, UQ, UR, US, UT, UU, UV, UW, UX, UY, UZ, VA, VB, VC, VD, VE, VF, VG, VH, VI, VJ, VK, VL, VM, VN, VO, VP, VQ, VR, VS, VT, VU, VV, VW, VX, VY, VZ, WA
• USA: FC, FH, FL, LA, SD, SP, SR, TH, TJ, VI, VX
• Switzerland: DI, FA, FI, GI, LA, LC, LE, LI, LO, LP, LS, LT, LV, LW, LX, LY, LZ, MA, MI, MO, NI, NO, OA, OB, OC, OD, OE, OF, OG, OH, OI, OJ, OK, OL, OM, ON, OO, OP, OQ, OR, OS, OT, OU, OV, OW, OX, OY, OZ, PA, PB, PC, PD, PE, PF, PG, PH, PI, PJ, PK, PL, PM, PN, PO, PP, PQ, PR, PS, PT, PU, PV, PW, PX, PY, PZ, QA, QB, QC, QD, QE, QF, QG, QH, QI, QJ, QK, QL, QM, QN, QO, QP, QQ, QR, QS, QT, QU, QV, QW, QX, QY, QZ
• Germany: LP, MA, MI, MO
• Belgium: PO

Now for the numbers. Until the late 2000s, the format was three or four digits. For example, “SD003” would mean made in France (SD) during the 3rd week of 2000. Starting around 2007, the format shifted to four digits: the first two indicate the week, and the last two indicate the year. So “SD1220” means week 12 of 2020. Keep in mind that the week numbers run from 01 to 52, and the year numbers are the last two digits of the year (e.g., 20 for 2020).

One tricky part: Louis Vuitton doesn’t always use a consistent font or stamp depth. Some codes are crisp and clear, while others look like they were stamped with a worn-out tool. That’s normal. But if the letters are perfectly aligned, the font looks like a standard computer font, or the code is printed rather than embossed, that’s a red flag.

Common Mistakes and Red Flags

Even with a date code in hand, you can be fooled. Counterfeiters have gotten very good at faking these stamps, so here are some warning signs to watch for:

• Missing code on pre-2021 bags: If the bag was made before 2021 and has no date code at all, that’s a major red flag. Exceptions exist for very rare vintage pieces, but in general, no code equals no authenticity.
• Code on a removable tag: Authentic Louis Vuitton date codes are always stamped directly on the bag, not on a hanging tag or a separate card. If you find a code on a dangling tag, it’s likely fake.
• Inconsistent font or spacing: Real date codes use a specific, slightly irregular stamp. If the letters and numbers are perfectly spaced and the font looks like Times New Roman, be suspicious.
• Code that doesn’t match the style: Some counterfeiters slap a random code on a bag. For example, a code that says “FL” (France) on a bag that’s clearly a newer model made in the USA is a mismatch. Research the typical factory codes for your specific bag style.
• Code that’s too easy to find: Authentic date codes are often hidden in awkward spots. If you spot it immediately in the center of a pocket, that’s not typical.

Also, remember that the date code is just one piece of the puzzle. A correct code doesn’t guarantee authenticity—counterfeiters can copy real codes from genuine bags. Always combine the date code check with other authentication factors: the quality of the canvas, the stitching, the hardware, the heat stamp on the leather, and the overall feel of the bag.

Practical Tips for Buyers and Sellers

Whether you’re buying a pre-loved Louis Vuitton or selling one, here’s how to use date codes wisely:

• For buyers: Always ask the seller for a clear photo of the date code before purchasing. If they can’t provide one, or if the photo is blurry or taken from an odd angle, proceed with caution. Cross-check the code against online resources (but don’t rely solely on them—use your own eyes). And remember, a missing code on a bag from 2021 or later is normal, but on an older bag, it’s a dealbreaker.
• For sellers: Include a clear, well-lit photo of the date code in your listing. It builds trust and shows you’ve done your homework. If you’re selling a bag from after 2021, note that it has a microchip instead of a date code—this prevents confusion with buyers who expect a visible stamp.
• General advice: Don’t panic if the date code is faint or slightly worn. Leather ages, and stamps can fade over time. But if the code looks like it was added recently (e.g., the leather around it is pristine while the rest of the bag is worn), that’s a red flag. Also, be aware that some vintage bags from the 1980s had codes that are almost impossible to read today—that’s part of their charm, but it also makes authentication trickier.

Finally, trust your gut. If a deal seems too good to be true, it probably is. A Louis Vuitton date code is a powerful tool, but it’s not a magic wand. Use it as part of a broader authentication process, and you’ll be well on your way to confidently buying or selling that dream bag. Happy hunting!