How can I verify an OEKO-TEX claim from a PVA yarn supplier in China?

First confirm which claim the supplier is making

A supplier may mean that a company holds a certificate, that a particular yarn article is covered, or that a delivered batch was tested. Those are different statements. Ask for the full certificate or report and identify its scheme, holder, certificate number, valid period, product description and stated scope. Do not treat an OEKO-TEX logo on a website or a certificate for a related product as proof that the offered PVA yarn is included.

OEKO-TEX describes STANDARD 100 as testing textile articles for harmful substances, with requirements tied to intended use and product class. Its public guidance says the label or certificate number can be checked through Label Check. That process verifies the certification record shown there; it does not replace your own lot acceptance tests or prove dissolution, strength, batch consistency or every buyer-specific requirement.

Read the scheme's STANDARD 100 overview and use the official OEKO-TEX Label Check to verify the identifier.

Match the certificate holder and article scope

Compare the name on the certificate with the legal entity that will manufacture or sell the yarn. If they differ, request a document trail that explains the relationship and who is responsible for the certified article. Next compare the product description to the actual offer: fiber or yarn form, grade, color or finish if stated, and the intended use or product class. A certificate may be valid and still be irrelevant to the yarn in the quotation.

Keep certification evidence separate from lot quality evidence

A scheme certificate answers a defined certification question. It does not show that every shipment meets count tolerance, tensile criteria, dissolution conditions, packaging or shade requirements. If your purchase specification includes those items, request a lot-specific report or release record for the offered batch, and check that it uses your agreed method. Keep the certificate verification and lot evaluation as separate lines in the approval record.

If the supplier sends a screenshot, partial document or an identifier that cannot be verified, ask for the complete certificate and the issuing body's lookup result. If Label Check returns a different article or holder, pause the claim and request clarification before the certificate is used in marketing, compliance files or purchasing approval.

Record the result against the exact purchase

Save the verified certificate number, date checked, holder, covered article and the supplier's explanation of any gap between the holder and seller. Tie it to the exact SKU or grade in the quotation, then list any separate tests required for your order. Recheck status when renewing a supply approval or when a certificate expires, product description changes or manufacturer changes.

The next step is to send the supplier the exact yarn description and ask for the certificate scope that covers it. Verify the number in the official tool, then decide whether the document meets your buyer requirement. If the question concerns a delivered batch's process performance, ask for the batch evidence and run the relevant process trial separately.