{
  "id": "C09",
  "url": "https://cartforagents.com/guides/product-material-data",
  "title": "Product material data: tie composition and certification claims to proof",
  "description": "Separate composition, performance and certification claims using source, issuer, scope and expiry fields in a substantiation worksheet.",
  "answer": "Split every material claim into one of three types: what the product is made of (composition), what it does (performance) or who vouches for it (certification). For each certification, record the issuer, the certificate or licence number, exactly what it covers, its status and the date you last checked it, and publish those words next to the claim. In 1,620 Shopify catalog results, only two descriptions gave a certificate number.",
  "take": "Certification claims are where trust is won or lost. Only two of 1,620 catalog results gave a certificate number, so publishing yours, with what it covers, is a simple way to stand out.",
  "summary": "Across 1,620 catalog results, 93 Shopify-generated spec lines were labelled as certifications. Two listings gave a certificate number, and in six the named scheme appears nowhere in the merchant's title or description. Here is a worksheet that keeps each claim tied to its proof.",
  "claims": [
    {
      "text": "Across 162 saved Shopify agent-catalog searches (1,620 result occurrences), 93 results had a Shopify-generated tech_specs line beginning \"Certification\" or \"Certifications\". 35 named at least one recognisable certification scheme; 50 listed only attribute claims such as BPA-free, vegan, cruelty-free or non-toxic, with no scheme or issuer.",
      "source_title": "Cart for Agents: Shopify agent-catalog snapshot, Oct 26, 2026 (How we checked, this page)",
      "source_url": "https://cartforagents.com/guides/product-material-data#how-we-checked",
      "source_date": "2026-10-26",
      "method": "observed",
      "limitation": "Result occurrences, not distinct products. Our scheme list was hand-built; a scheme we did not list would be counted as an attribute claim."
    },
    {
      "text": "Of those 35, six named a scheme that appears nowhere in the listing's title or description: bluesign (toddler snowsuit, position 1), GOTS (mini crib sheet, position 2), Leaping Bunny (scalp scrub, position 7; laundry detergent sheets, position 4), OEKO-TEX and CertiPUR-US (neck pillow, position 1) and FSC (stocking stuffers, position 6).",
      "source_title": "Cart for Agents: Shopify agent-catalog snapshot, Oct 26, 2026 (How we checked, this page)",
      "source_url": "https://cartforagents.com/guides/product-material-data#how-we-checked",
      "source_date": "2026-10-26",
      "method": "observed",
      "limitation": "Text matching on title and description only. The claim may be on the product page, packaging or a certificate we did not see; Shopify may have used data we did not receive."
    },
    {
      "text": "Only two descriptions in the 1,620 results gave a certificate or label number: a compostable trash bag at position 10 (\"Biodegradable Products Institute (BPI) Certificate #10529252. Certified commercially compostable only.\") and a yoga mat at position 9 (an OEKO-TEX Standard 100 number followed by the testing institute).",
      "source_title": "Cart for Agents: Shopify agent-catalog snapshot, Oct 26, 2026 (How we checked, this page)",
      "source_url": "https://cartforagents.com/guides/product-material-data#how-we-checked",
      "source_date": "2026-10-26",
      "method": "observed",
      "limitation": "Regex search for certificate, licence and label number patterns; unusual formats could be missed. We did not look the numbers up."
    },
    {
      "text": "The yoga mat's description gave its OEKO-TEX label number in upper case; Shopify's generated spec line repeated it in lower case. OEKO-TEX's Label Check page says its label numbers are case sensitive.",
      "source_title": "OEKO-TEX: Label Check",
      "source_url": "https://www.oeko-tex.com/en/label-check",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "We did not test whether Label Check rejects the lower-case form."
    },
    {
      "text": "Shopify marks the Global Catalog description, tech_specs, top_features, unique_selling_points and metadata.attributes (which includes material) as Inferred: generated or enriched by Shopify, possibly inaccurate, and not merchant-authored source text.",
      "source_title": "Shopify: Global Catalog MCP, Inferred response fields",
      "source_url": "https://shopify.dev/docs/agents/catalog/global-catalog",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "Living documentation; it does not say how any assistant weighs these fields."
    },
    {
      "text": "Google's certification attribute is for certifications required by local regulations and lists four supported certifications: EU Energy Labeling (EPREL), two vehicle CO2 schemes (France, Germany) and Energy Star in the United States and Canada. Its sub-attributes are authority, name, code and value, mapping to Schema.org Product.hasCertification.",
      "source_title": "Google Merchant Center Help: Certification [certification]",
      "source_url": "https://support.google.com/merchants/answer/13528839?hl=en",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "Textile, cosmetic and compostability schemes are not in the supported list; that is our reading of the current page."
    },
    {
      "text": "Google's material attribute describes the main fabric or material, is required for products that vary by material, and takes up to 200 characters. OpenAI's product feed has an optional material field, \"Principal materials in the item\", and its field reference did not mention certification when we checked.",
      "source_title": "Google Merchant Center Help: Material [material]; OpenAI Commerce: Products feed reference",
      "source_url": "https://support.google.com/merchants/answer/6324410?hl=en",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "Field lists change; re-check before acting."
    },
    {
      "text": "Schema.org's Certification type includes certificationIdentification, described as an identifier registered with an independent certification body that can typically be used to verify the certification, plus certificationStatus (active or inactive), issuedBy, validFrom and expires.",
      "source_title": "Schema.org: Certification",
      "source_url": "https://schema.org/Certification",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "A vocabulary, not a statement that any platform reads these properties for these schemes."
    },
    {
      "text": "The FTC's Green Guides say it is deceptive to misrepresent that a product has been certified by an independent third party, and that third-party certification does not remove the marketer's obligation to substantiate every claim the certification reasonably conveys.",
      "source_title": "eCFR: 16 CFR 260.6, Certifications and seals of approval",
      "source_url": "https://www.ecfr.gov/current/title-16/chapter-I/subchapter-B/part-260/section-260.6",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "US guidance on environmental marketing; not legal advice, and other countries differ."
    },
    {
      "text": "The FTC says that if a written ad, including an internet ad, for a textile product makes any statement about a fiber, the label's fiber content must appear in the ad (percentages not required), with fibers named in descending order of weight; internet catalog descriptions must also state whether the item is made in the USA, imported or both.",
      "source_title": "FTC: Threading Your Way Through the Labeling Requirements Under the Textile and Wool Acts",
      "source_url": "https://www.ftc.gov/business-guidance/resources/threading-your-way-through-labeling-requirements-under-textile-wool-acts",
      "source_date": "2026-10-27",
      "method": "documented",
      "limitation": "US textile and wool rules only; summarised, not legal advice."
    }
  ],
  "sources": [
    {
      "title": "Shopify: Global Catalog MCP",
      "url": "https://shopify.dev/docs/agents/catalog/global-catalog",
      "accessed": "2026-10-27"
    },
    {
      "title": "Google Merchant Center Help: Certification [certification]",
      "url": "https://support.google.com/merchants/answer/13528839?hl=en",
      "accessed": "2026-10-27"
    },
    {
      "title": "Google Merchant Center Help: Material [material]",
      "url": "https://support.google.com/merchants/answer/6324410?hl=en",
      "accessed": "2026-10-27"
    },
    {
      "title": "Google Search Central: Merchant listing structured data",
      "url": "https://developers.google.com/search/docs/appearance/structured-data/merchant-listing",
      "accessed": "2026-10-27"
    },
    {
      "title": "OpenAI Commerce: Products feed reference",
      "url": "https://developers.openai.com/commerce/specs/file-upload/products",
      "accessed": "2026-10-27"
    },
    {
      "title": "Schema.org: Certification",
      "url": "https://schema.org/Certification",
      "accessed": "2026-10-27"
    },
    {
      "title": "OEKO-TEX: Label Check",
      "url": "https://www.oeko-tex.com/en/label-check",
      "accessed": "2026-10-27"
    },
    {
      "title": "Global Standard (GOTS): Certified Suppliers Database",
      "url": "https://global-standard.org/find-suppliers-shops-and-inputs/certified-suppliers",
      "accessed": "2026-10-27"
    },
    {
      "title": "Biodegradable Products Institute: Certified product catalog",
      "url": "https://products.bpiworld.org/",
      "accessed": "2026-10-27"
    },
    {
      "title": "eCFR: 16 CFR 260.6, Certifications and seals of approval",
      "url": "https://www.ecfr.gov/current/title-16/chapter-I/subchapter-B/part-260/section-260.6",
      "accessed": "2026-10-27"
    },
    {
      "title": "FTC: Threading Your Way Through the Labeling Requirements Under the Textile and Wool Acts",
      "url": "https://www.ftc.gov/business-guidance/resources/threading-your-way-through-labeling-requirements-under-textile-wool-acts",
      "accessed": "2026-10-27"
    }
  ],
  "limitations": [
    "The worksheet is our proposal. We have not measured whether attaching evidence changes picks, rank, returns or sales in any assistant.",
    "Counts come from 162 unpersonalized Shopify agent-catalog searches on October 26, 2026: 1,620 result occurrences, not distinct products, and not a sample of all listings.",
    "We did not look up any certificate, licence or label number, so we make no statement about whether any listing's certification is valid.",
    "A claim missing from the catalog record may still be on the product page or packaging.",
    "Platform field lists and certifier lookup tools were checked on 2026-10-27 and change; re-check before acting.",
    "US FTC rules are summarised for orientation only; this is not legal advice.",
    "Store, product-line and material brand names are withheld."
  ],
  "related": [
    "https://cartforagents.com/guides/agent-ready-product-data",
    "https://cartforagents.com/guides/product-specification-template",
    "https://cartforagents.com/guides/size-chart-accessibility",
    "https://cartforagents.com/guides/unit-pricing-ecommerce",
    "https://cartforagents.com/guides/product-constraint-coverage",
    "https://cartforagents.com/guides/shopify-global-catalog"
  ],
  "published": "2026-10-27",
  "updated": "2026-10-27",
  "checked": "2026-10-27",
  "kind": "guide"
}