Batch codes: check what you actually bought

A batch code is the short production code, usually 3 to 7 letters and digits, printed on the bottom of a perfume box and repeated on the bottle, often etched into the glass or printed on a sticker under the base. The two should match, and the code can be decoded to reveal when the bottle was made.

Where to find it

On the box: printed or stamped on the underside, near the barcode. On the bottle: look at the base, the back label, or etched faintly into the glass itself. Take the bottle out of the box and compare. A missing code on either, or two codes that disagree, is reason enough to return it.

What it tells you

Free decoder sites (CheckFresh and CheckCosmetic are the known ones) translate the code into a production date for most major brands. That matters for two reasons. It confirms the box and bottle left the factory together. And it tells you the age: a fragrance produced four years ago that sat in a warm warehouse may have turned, even though a well-stored bottle of the same age is perfectly fine.

What it can and cannot prove

Read the asymmetry correctly. A missing or mismatched code is strong evidence of a fake. A correct code proves very little, because counterfeiters copy real codes from real boxes. Treat the batch code as one check in a row of them; the full row is in how to spot a fake perfume.

FAQ

How old is too old?

Unopened and stored dark and cool, most fragrances are fine for five years or more. Citrus-heavy scents age fastest. Once opened, expect two to four good years.

Do testers have batch codes?

Yes. Testers are regular factory product in plain packaging, so the code is there and decodes normally.

My batch code doesn't decode. Is the perfume fake?

Not necessarily. Decoders lag on new brands and recent format changes. Check the other signs before concluding anything.