A logo without a number means nothing

Certification logos are doing a lot of work on clothing tags these days. Little green leaves, reassuring typefaces, the word "certified" in a serious font. Some of them mean something rigorous. The rest are decoration.

The rule that separates them fits in one sentence: a real certification comes with a number you can look up. A logo without a certificate number is unverifiable marketing, no matter how official it looks.

Two schemes are worth memorising. OEKO-TEX Standard 100 means the finished garment, not just the raw fibre, was lab-tested against limits for more than 1,000 substances. It comes in classes, and Class I is the strictest, written for children under three, which makes it a quietly useful benchmark for anyone with sensitive skin. Every genuine certificate carries a number you can check for free through the OEKO-TEX Label Check, and certificates renew annually, so an expired one tells you something too.

GOTS, the Global Organic Textile Standard, answers a different question. It requires at least 95% organic content and adds environmental and social criteria along the supply chain. Again, the mechanism is a licence number, verifiable in a public database anyone can search.

Notice what both schemes have in common. The credibility doesn't live in the logo; it lives in the lookup. Any brand can print a leaf. Not any brand can produce a valid certificate number that resolves in an independent registry, dated this year, matching the product in your hand.

This matters more than it should, because enforcement elsewhere is thin. A Fur Free Alliance study of 667 garments containing animal fibres found 68% breached EU labelling rules. Where regulators are stretched, checkable certification is the closest thing shoppers have to enforcement of their own, and it's the same logic Lynen applies to the fibre claim itself.

Next time a tag flashes a logo at you, look for the number. Thirty seconds in a free database settles what a marketing department spent months implying.