Q: How long is an OEKO-TEX Standard 100 certificate valid?
A Standard 100 certificate is issued for a limited period, commonly one year, and must be renewed after the issuing institute reviews the product and the site. An expired certificate does not prove current compliance, even if the product has not changed. The date on the document, not the date you first received it, is what your customer will check.
Before accepting a certificate, confirm the validity dates, the applicant name, the production site, the product class and the specific articles and colours listed. The certificate number can be checked against the issuing body's records, and the label on the goods should match the certified article. If the mill has several sites, confirm which one made your tape.
Plan renewal into the supply calendar: ask for the new certificate before the old one expires, and keep the previous version in the file so the chain of evidence is unbroken. Where a certificate is near expiry at shipment, request written confirmation of renewal rather than shipping on an expired document.