How to authenticate a Louis Vuitton bag.
7 min read · By the Gaby's Bags team
Louis Vuitton is among the luxury brands most frequently targeted by counterfeiters, and modern superfakes can fool a quick glance. No single check proves a bag is real — authentication is about stacking small signals until the picture is consistent.
This guide covers the checkpoints professional authenticators look at first. Use it when evaluating a bag from any seller, including us.
Start with the date code — but know its limits
From the early 1980s until March 2021, Louis Vuitton stamped most bags with a date code: a short letter-and-number combination that identifies where and roughly when the bag was made. It is not a serial number — many bags share the same code, and counterfeiters print plausible codes too. A correct-looking date code doesn't prove authenticity; an inconsistent one is a reason to stop and obtain professional review.
For bags made from 2007 to early 2021, the format is two letters followed by four numbers. The letters indicate the factory location. The first and third numbers give the week of the year, and the second and fourth give the year. For example, SD2159 reads as week 25 of 2019.
For bags made between 1990 and 2006, the same structure applies, but the numbers encode the month instead of the week.
Around 2021, Louis Vuitton phased out visible date codes on newer production and introduced embedded identification technology. A code that conflicts with a style's documented production era warrants review, but transition timing, wear, and repairs mean presence or absence alone is not proof.
Check that the factory letters match the "made in" stamp. A code that indicates a French workshop on a bag stamped "Made in USA" is inconsistent.
Read the heat stamp
The embossed "LOUIS VUITTON®" stamp is a useful consistency check, but typeface details vary by era and factory and should never be used alone.
Font weight. Authentic stamping is thin, crisp, and evenly pressed. Fakes often look thick, blurry, or unevenly deep.
The O's. Louis Vuitton's O's are very round — almost perfect circles, larger than you'd expect next to the other letters.
The L. The L has a short horizontal foot. On many fakes it's noticeably long.
Alignment. Text is level and centered, with consistent letter spacing. Crooked or cramped stamping is a strong red flag.
Inspect the canvas and alignment
On monogram pieces, Louis Vuitton cuts canvas deliberately. On classic styles made from a single continuous piece of canvas (like the Speedy), the monogram on one side appears upside down on the other — that's correct, not a defect. Fakes assembled from two panels often show the logo upright on both sides of styles where it shouldn't be.
Look for symmetry: monogram elements should be placed consistently relative to seams and edges, and Damier checks should line up across seams. Sloppy pattern matching at seams is one of the fastest ways to spot a counterfeit.
Check stitching, hardware, and materials
Stitching. Even, slightly angled stitches in a mustard-yellow linen thread on vachetta trim, with consistent stitch counts on matching parts (for example, the same number of stitches across the top of each handle tab).
Hardware. Zippers, locks, and rivets should be consistent with the exact style and production era, with clean engraving and appropriate finish. Lightweight or visibly chipping hardware warrants closer review.
Vachetta leather. The untreated cowhide trim starts pale and develops a warm honey patina with age. "Vachetta" that looks plasticky, stays stark white on an older bag, or is dyed to fake patina deserves suspicion.
Odor and glue. A strong chemical odor or visible glue at seams and edges warrants closer review, but odor alone cannot authenticate a bag.
When to rely on professional authentication
Superfakes get closer every year, and some replicate most of the checkpoints above. For any meaningful purchase, buy from a seller that offers professional, technology-backed authentication and a money-back authenticity guarantee.
Every eligible bag we sell at Gaby's Bags is verified using Entrupy, an AI-powered authentication device that captures microscopic images of materials and construction. Entrupy provides its eligible licensee with a one-year financial guarantee subject to its terms; customer-facing protection remains the seller's responsibility.
Ready to shop?
Every eligible piece we sell is verified with Entrupy and backed by our authenticity guarantee.
Shop Authenticated Louis Vuitton