GRS Certification: Sourcing Recycled Materials from China

The Global Recycled Standard (GRS) is the international certification most buyers rely on when they want recycled-content claims verified. Owned by Textile Exchange, it certifies products containing at least 20% verified recycled material, and it goes beyond content percentages: it also sets requirements for chain of custody, chemical management, and social and environmental practices at the factories involved.

If you source recycled polyester, nylon, cotton, or similar materials from China, GRS certification is often the mechanism that stands between your marketing claim and an accusation of greenwashing. The standard itself is straightforward. The hard part is verification: a supplier showing you a GRS logo proves far less than most buyers assume, and in China's enormous recycled-materials market, that gap is exactly where problems start. CN Ally routinely checks GRS scope certificates and transaction documents as part of supplier vetting — because the certificate tells you what was audited, not what you will actually receive.

This guide covers what GRS certification verifies, the recycled-content thresholds, how Chinese suppliers get certified, how you can verify their claims yourself, and the fraud patterns buyers should watch for.

What does GRS certification actually verify?

GRS is a full-product standard, not just a recycled-content label. Certification confirms four things: that the recycled material is genuinely recycled, that its identity is preserved as it moves through the supply chain, that processing meets environmental and chemical requirements, and that the facilities handling it meet social criteria.

The verification rests on third-party audits. An accredited certification body — organizations such as SGS, Control Union, or Intertek, overseen by accreditation bodies like IOAS — audits each site against the standard and issues a Scope Certificate. GRS was originally developed by Control Union Certifications in 2008 and is now owned by Textile Exchange, the global non-profit that manages a family of fiber standards including the Recycled Claim Standard (RCS) and the Content Claim Standard (CCS), which supplies the chain-of-custody foundation GRS builds on.

Two definitions matter here because they shape everything downstream. Pre-consumer recycled material comes from waste generated during manufacturing (factory offcuts, rejected batches) that never reached a buyer. Post-consumer recycled material comes from products that were used and discarded — PET bottles, worn garments, discarded fishing nets. GRS accepts both, but many buyers care which one they are getting, and the distinction becomes a fraud vector we will come to below.

How much recycled content does GRS require?

At least 20% of a product's material must be verified recycled content for it to be certified. That is the certification floor, but there is a second threshold that matters more for how products are sold: the consumer-facing GRS logo and product labels generally require at least 50% verified recycled content.

The gap between 20% and 50% is where buyer confusion concentrates. A product with 20% to 49% recycled content can move through the supply chain under GRS Transaction Certificates — the documents that track certified material between buyer and seller — but it cannot carry the GRS logo that shoppers see. So when a supplier tells you a product is "GRS certified," your next question should always be the percentage and whether the claim is certified content tracked on a transaction certificate or a consumer-facing label claim. These are different things, and only the underlying documents tell you which one you have.

RCS, the lighter-weight sibling standard also managed by Textile Exchange, certifies recycled content only — at least 5% — with no social, environmental, or chemical processing requirements. It verifies that recycled material is present and tracked; GRS verifies the material plus how it was made. If a Chinese supplier shows you RCS documents when you asked for GRS, you are not getting the factory-level environmental and labor coverage you expected.

GRS · RCS

• Minimum recycled content: 20% · 5%
• Consumer-facing label threshold: 50% · No logo use rules tied to content percentage
• Chain of custody: Yes, via CCS · Yes, via CCS
• Environmental processing requirements: Yes · No
• Chemical restrictions: Yes · No
• Social requirements: Yes · No
• Typical use: Textiles, plastics, packaging making verified recycled and responsible-processing claims · Any product needing recycled-content verification only

How does the certification process work for a Chinese supplier?

The supplier applies to an accredited certification body operating in China — international firms like SGS and Control Union maintain Chinese offices and auditors, and several domestic bodies are also accredited. The body audits the facility against the GRS requirements: documentation of material inputs, segregation of certified and non-certified materials on the production floor, chemical management records, wastewater handling, and labor conditions.

If the audit passes, the certification body issues a Scope Certificate naming the legal entity, its addresses, the product categories and processing steps covered, and a validity period of one year. Recertification audits happen annually. One point buyers often miss: the Scope Certificate covers what the company is approved to do, not what any given shipment contains.

The second document is what actually travels with your order. For every shipment of certified material the supplier sells onward, the certification body issues a Transaction Certificate (TC) recording the seller, the buyer, the product, the recycled-material type and certified weight, and the declared origin. The TC is issued by the certification body, never by the supplier itself. A supplier-printed letterhead claiming a transaction is GRS-certified is not a TC.

Subcontractors add a layer worth checking. If your supplier outsources part of production — dyeing, knitting, assembly — the subcontractor must appear in the certification setup, and the TC notes whether subcontracted processing was involved. A factory that silently hands your recycled-polyester fabric to an uncertified dye house breaks the chain of custody even if the factory itself holds a valid certificate.

How can a buyer verify a supplier's GRS claim?

Verification is a document chain, not a single document. The claim on your order is only as strong as the weakest link between the Scope Certificate and the Transaction Certificate covering your specific shipment. Work through these checks in order.

First, read the Scope Certificate itself. Confirm the legal entity name and address match the company you are actually dealing with — trading companies sometimes present a sister factory's certificate. Confirm the certificate is currently valid; they expire annually. Confirm the product category and processing steps in the scope actually cover the product you are ordering. A certificate for "recycled polyester fabric" does not certify recycled nylon zippers from the same supplier.

Second, check the certificate against Textile Exchange's public "Find a Certified Company" database. Search by company name or certificate number and confirm the status is current. This takes minutes and is the single highest-value step in the whole process. Certificates get suspended and revoked; the database reflects that while a PDF the supplier emailed you may be from three years ago.

Third, require a Transaction Certificate for your order, issued by the certification body — not a supplier-generated document. Verify the buyer named on the TC is you (or your designated trading entity), the product matches your PO, the certified weight is consistent with what you are paying for, and the dates fall within the Scope Certificate's validity window. Repeat this for every order. One TC does not cover future shipments.

Fourth, ask the subcontracting question directly: does any part of this order pass through another facility, and is that facility certified? Compare the answer against the TC, which records whether subcontracting was involved. If you are auditing a factory in person or through an agent, a factory audit can cross-check whether the certified material segregation and recordkeeping observed on the floor match what the paperwork describes.

The honest version of this checklist is simple: a GRS logo proves nothing by itself. A valid Scope Certificate proves a company was approved for certain products within certain dates. Only the Transaction Certificate connects your specific order to the certified chain. Buyers who stop at the logo are the ones who end up with unverified claims.

What fraud risks should buyers watch for?

The recycled-materials market creates fraud incentives that the certificate paperwork does not fully eliminate. These are the patterns that surface most often.

Expired or suspended certificates presented as current. This is the cheapest trick and the most common. A Scope Certificate valid for one year gets recycled in sales decks for years after expiry. The fix is the database check described above — it costs nothing and catches this immediately.

Scope mismatch. A supplier holds a genuine, valid certificate for recycled polyester yarn but sells you recycled polyester fabric it wove on uncertified equipment — or worse, fabric from virgin polyester bought on the open market. The certificate is real; your product was never inside its scope. Matching product category and processing steps against your order is the defense.

Supplier-issued "transaction certificates." A TC is issued by the certification body, not the seller. Any transaction document produced on the supplier's own letterhead, however official it looks, is not a TC and proves nothing. Some suppliers misunderstand this; some are counting on you misunderstanding it. When in doubt, contact the certification body named on the Scope Certificate and ask whether a TC with that number exists.

Virgin material sold as recycled. This is the hard one, because it happens upstream where you cannot see it. The GRS Implementation Manual itself treats recyclers who process waste from their own production as elevated fraud risk, requiring certification bodies to scrutinize whether their "recycled" inputs genuinely qualify. Virgin polyester costs more than recycled in many cases, but virgin plastic flakes and off-spec resin are cheap, and relabeling them as recycled PET is profitable precisely when buyers do not verify. There is no paper fix for this at your tier: you are relying on the certification body's upstream audit quality, which is why the credibility of the certifier matters as much as the certificate.

Pre-consumer inflated as post-consumer. Some markets and buyer claims specifically require post-consumer content. Pre-consumer material (factory waste re-ground into new product) is easier to source and cheaper, and GRS accepts it — but selling it as post-consumer misrepresents the claim. If your specification demands post-consumer content, confirm the TC records the material category, not just the recycled percentage.

Logo misuse. The consumer-facing GRS logo requires 50% recycled content and authorization. Products below that threshold, or from suppliers whose certification has lapsed, sometimes carry the logo anyway. Logo files circulate freely; authorization does not. If a supplier's marketing shows the logo, check the percentage and the current certificate before trusting it.

None of these risks means Chinese suppliers cannot be trusted — China hosts some of the world's most capable recycled-material producers, and many hold impeccable documentation. It means the certificate is the start of verification, not the end of it. When the paperwork gets complicated or a supplier's answers stop being straight, having someone on the ground matters: an agent can pull the Scope Certificate details, cross-reference the certification body's records, and confirm during quality inspections that the factory's actual material handling matches its certified claims.

Frequently asked questions

Is GRS certification mandatory in China?

No. GRS is a voluntary international standard everywhere, including China. Chinese law regulates waste imports and environmental compliance for recyclers separately, but no regulation requires a factory to hold GRS certification. Buyers request it because their brands, retailers, or regulators in their home markets require verified recycled-content claims — the demand comes from the sales channel, not Chinese law.

What is the difference between GRS and RCS certification?

GRS certifies recycled content (minimum 20%) plus environmental, chemical, and social processing requirements with chain of custody. RCS certifies recycled content (minimum 5%) with chain of custody only — no processing, chemical, or social criteria. GRS is the fuller claim; RCS is appropriate when you only need verified recycled-content numbers.

Can a supplier use the GRS logo if the factory is certified?

A certified factory may reference its certification in B2B contexts, but the consumer-facing GRS logo has its own rules: generally at least 50% verified recycled content, proper label claim wording, and the certified chain extending to the labeled product. The Scope Certificate alone does not authorize logo use on any product. Textile Exchange's claims policy governs exactly what can appear on packaging.

How do I check whether a GRS certificate is genuine?

Get the certificate number and the certification body's name from the Scope Certificate, then search Textile Exchange's public certified-company database. Confirm the entity name, scope, and validity dates are current. Then ask the supplier for the Transaction Certificate covering your specific order — issued by the certification body — and check it against the same details. If the supplier cannot produce a TC for your shipment, the certification does not cover your order.

Does GRS certification mean a product is 100% recycled?

No. The certification floor is 20% recycled content; the consumer label threshold is 50%. A GRS-labeled product may contain anywhere from half to all recycled material, and the exact percentage should be stated with the claim. "GRS certified" tells you the content was verified and tracked — it does not mean the product is entirely recycled, organic, plastic-free, or carbon neutral.

Do subcontractors need their own GRS certification?

Subcontractors that handle certified material must be covered under the certification — either listed in the Scope Certificate arrangement or certified themselves. The Transaction Certificate for your order records whether subcontracted processing was involved. An uncertified subcontractor in the chain is one of the most common chain-of-custody breaks, so always ask who else touches your product.

What to do before you place your next recycled-materials order

Run this decision rule on every supplier before committing. If the supplier cannot produce a current Scope Certificate matching their legal entity — stop and find another supplier. If the certificate is valid but its product scope does not cover your item — stop. If the scope covers your item, require a Transaction Certificate for your specific order before payment, and verify it was issued by the certification body rather than the supplier. If any part of production is subcontracted, confirm the subcontractor is covered in the chain. Only when all four conditions hold should a recycled-content claim go anywhere near your packaging or marketing.

That discipline takes time, which is why many buyers fold it into their existing sourcing workflow: certificate verification during supplier selection, subcontracting and chain-of-custody questions during the factory visit, and TC requirements written into the purchase order terms. If you would rather have a team run the document checks, factory verification, and inspection before you commit to a container of recycled material, write to hi@cnally.com — a few days of verification costs far less than a shipment you cannot legally claim as recycled.