The only reliable way to verify a textile certificate is to request the Transaction Certificate (TC) that accompanies the specific shipment you are buying and to query the certificate number in the relevant official database (Textile Exchange, GOTS or OEKO-TEX). A logo on the supplier's website or the Scope Certificate (SC) they hold does not, on its own, prove that those goods are certified: the SC only shows that the facility is authorized, whereas the TC links the conformity and volume of that batch to certified input. Below you will find the difference between the two documents, quick verification steps, chain-of-custody models, and the red flags you need to watch for.
What is the difference between a Scope Certificate and a Transaction Certificate?
The two answer different questions. A Scope Certificate answers "is this facility authorized to process this standard?", while a Transaction Certificate answers "are these specific goods actually certified?". The SC is static and usually valid for one year; the TC is specific to each shipment and matches the invoice/batch details. In a purchasing decision, the ultimate proof is always the TC.
| Feature | Scope Certificate (SC) | Transaction Certificate (TC) |
|---|---|---|
| What it proves | That the facility is authorized to process a material/standard | The conformity of the goods in a specific shipment |
| Scope | Facility and process based (static) | Shipment and batch based (dynamic) |
| Volume link | None | Yes: links volumes to certified input |
| Validity | Usually 1 year, renewable | Specific to a single shipment |
| Role in purchasing | Pre-qualification check | Final proof document |
| Typical mistake | Treating it as product proof | Never requesting it |
Assessing whether certificate numbers are genuine and what they cover, together with the GRS, RCS and OCS definitions, makes it easier to see which claim is backed by which document.
How do I verify a certificate in 30 seconds?
For verification, rely on official databases rather than the supplier's word. The following steps let you confirm the document independently:
- Identify the document type. Is what you hold an SC or a TC? For purchasing, request a TC; without it, the claim is unproven.
- Read the certificate number and standard. Which standard (GOTS, GRS, RCS, OCS), which certification body, which validity date.
- Query the relevant database. Use the Textile Exchange / GOTS certificate search tools for recycled and organic content standards; for OEKO-TEX, confirm the QR code on the product with OEKO-TEX Label Check.
- Check the volume and batch match. Do the product, quantity and invoice details on the TC match your shipment exactly?
- Verify the threshold and claim. Does the content claim made by the supplier really meet the standard's minimum thresholds (see the table below)?
The minimum percentage thresholds behind content claims vary by standard; the right to use a logo and the certification threshold are not the same thing:
| Standard / claim | Minimum threshold | Note |
|---|---|---|
| GRS — certification | min 20% recycled content | Floor rate for certification |
| GRS — logo use | min 50% recycled content | A logo claim on the product requires this threshold |
| RCS | from 5% | Floor for a recycled content declaration |
| GOTS — "organic" | min 95% organic fiber | "Organic" label |
| GOTS — "made with organic" | min 70% organic fiber | Lower-grade claim |
The core chain-of-custody framework for GRS, RCS and OCS is the Content Claim Standard (CCS); this standard ensures the traceability of certified input throughout the supply chain. You can also review where recycled and organic content claims sit in the context of GOTS, RCS and carbon.
What are the chain-of-custody models?
The same certificate number permits different claims depending on which chain-of-custody model is used. The difference between saying a product "contains certified input" and saying it is "physically made from certified material" comes directly from this model.
| Model | How it works | Claim it permits |
|---|---|---|
| Segregation | Certified material is kept physically separate and not mixed | "This product is physically certified material" — the strongest claim |
| Controlled blending | Certified and non-certified are mixed in known proportions | Content claim based on the stated proportion |
| Mass balance | Certified input enters the system and is accounted for against output volume; a physical trace is not guaranteed | "There is X amount of certified input in the system" — not a physical product claim |
Because the mass balance model guarantees the accounting of the system rather than the physical content of the product, it is being restricted in consumer communication: for example, the Better Cotton mass balance product mark was removed as of May 2026. Do not accept a product claim without knowing which model applies.
What red flags should I look for in a fake or misleading certificate?
Each of the situations below is a warning that the certificate may be invalid, out of scope, or misused. Run through this checklist before a purchasing decision:
- Treating an SC as product proof. A Scope Certificate only shows that the facility is authorized; it does not prove your shipment. Request a TC.
- Logo claim above the threshold. For example, if the GRS logo requires min 50% but the product only meets the certification floor threshold (20%), the logo claim is invalid.
- Stock mixing. Mixing certified and non-certified stock without segregation breaks the traceability of the claim.
- Expired or out-of-scope certificate. A document whose validity date has passed, or that was issued for a different material/process, does not cover your product.
- Certificate lending. Presenting the certificate of a group company or an intermediary for a different facility that actually does the production.
- Volume inconsistency. If the quantities on the TC do not match the invoice and shipment, the claim is not supported.
- Logo only, no document. If there is a logo on the website but no verifiable certificate number or TC, there is no proof.
Certificate verification is intertwined with chemical management and supplier selection; the ZDHC compliance and GOTS / RCS / carbon frameworks help you assess a supplier's claims holistically. For the core terms of the standards, you can refer to the Glossary.