Guides
June 15, 2026
Do You Have to Test Every SKU for Compliance?
For the material itself, usually no. Under the CPSC component-part rule (16 CFR 1109), a material test attaches to the material and supplier and is shareable across every SKU built from it. What recurs is periodic testing on a schedule, not per SKU.
June 15, 2026
Which Component Substitutions Trigger CPSIA Retesting?
A decision table for children's-product importers: which resin, colorant, supplier, and process changes are a 'material change' under 16 CFR 1107.23 that forces a retest and a new Children's Product Certificate — and which changes don't.
June 14, 2026
Does Regrind or Material Substitution Void Your Certificate?
For children's products, swapping in regrind or a different resin is a 'material change' under 16 CFR 1107.23 that legally requires retesting. Why a material swap breaks any compliance certificate — and which changes don't.
June 14, 2026
Does an FDA Letter of Guaranty Actually Protect You?
An FDA Letter of Guaranty only shields you from penalties if its signer resides in the United States (21 USC 333(c)(2)). Why a guaranty from your Chinese supplier gives zero protection — and what a US-resident agent changes.
June 14, 2026
How CertDesk Verifies: Our Materials Methodology and Standards
How CertDesk verifies imported materials and compliance documents: who we are, the difference between diligence-grade and accredited testing, and the four-level assurance ladder we work to.
June 14, 2026
Material Compliance Verification: Is Your Product Actually What the Certificate Says?
A certificate certifies a sample, not your shipment — and the US importer of record holds the liability. What counts as proof of product compliance, how material compliance works across CPSIA, FDA food-contact, and PFAS rules, and how to verify the material itself.
June 12, 2026
Compliance for Plastic & Food-Contact Importers: When the Material Is the Risk
For importers of plastic housewares, kitchenware, and food-contact goods, compliance lives in the material itself — PFAS bans, BPS exposure, resin substitution.
June 12, 2026
Connecticut PFAS July 1, 2026: Label + Notify, Not a Ban
Connecticut's July 1, 2026 PFAS rule requires BOTH a label AND notice to CT DEEP — not a ban. What sellers must do in the 12 covered categories before 2028.
June 12, 2026
Minnesota's PFAS Rules: 11 Banned Categories Now, a Reporting Deadline in September
Minnesota banned intentionally added PFAS in 11 product categories in 2025. A separate reporting duty for sellers and importers comes due in September 2026.
June 12, 2026
What to Ask Your Supplier About PFAS (Before a State Law Asks You)
A practical guide for sellers: the PFAS questions that actually matter, where PFAS hides in your supply chain, and a five-question email you can adapt tonight.
June 12, 2026
PFAS State Requirements for Sellers: Banned, Labeled, or Reported — State by State (2026–2027)
Which states ban, label, or require PFAS reporting in 2026–2027? A state-by-state guide for sellers covering CT, MN, ME, NY, NH, NM, and WA deadlines.
June 11, 2026
The FBA Seller's CPSC eFiling Checklist (July 8, 2026)
A step-by-step CPSC eFiling checklist for Amazon FBA sellers who import: certificates, filing modes, broker handoff, and a timeline back from July 8, 2026.
June 11, 2026
Is There a De Minimis Exemption for CPSC eFiling? (No — Here's What That Means)
CPSC eFiling has no de minimis exemption, and de minimis duty-free treatment ended August 29, 2025. What small-parcel importers must file before July 8, 2026.
June 11, 2026
CPSC eFiling: The Importer's Guide to the July 8, 2026 Deadline
What the CPSC eFiling rule requires by July 8, 2026: who files, the certificate data elements, Full vs Reference filing modes, and a 5-step plan to get ready.
June 11, 2026
Full Message Set vs. Reference Message Set: Which CPSC eFiling Route Should You Use?
Full PGA Message Set or Reference Message Set? How each CPSC eFiling route works, a side-by-side comparison, and how to pick based on your shipping pattern.
June 11, 2026
The CPSC Product Registry: How Pre-Registration Works (and Why You Probably Want It)
How the CPSC Product Registry works: register products and certificates once, get three reference IDs, and cut per-entry filing errors before July 8, 2026.
June 11, 2026
What Your Customs Broker Will — and Won't — Do for CPSC eFiling
What customs brokers actually do for CPSC eFiling, what stays your responsibility, and the certificate data to hand off before every shipment arrives.
June 11, 2026
De Minimis Is Gone and eFiling Is Coming: The Compliance Cascade for Small-Parcel Sellers
De minimis ended August 29, 2025 and CPSC eFiling starts July 8, 2026. How the two rules stack up for small-parcel sellers, and what to do before the deadline.
June 11, 2026
Fake Test Report Red Flags: The Checks That Catch Them
The red flags that expose fake or altered supplier test reports — edited genuine documents, borrowed accreditation numbers — and the checks that catch them.
June 11, 2026
How to Verify Your Supplier's Test Report, Step by Step
A step-by-step guide to verifying a supplier's test report: ISO/IEC 17025 checks, accreditation scope, CPSC lab acceptance, and direct lab verification.
June 11, 2026
Is Your Testing Lab Still CPSC-Accepted? Four Labs Lost Acceptance in January 2026
CPSC withdrew acceptance of four China-based testing labs on January 15, 2026. What it means for your certificates, and how to check your lab today.
June 11, 2026
Resin Verification: Is the Material in Your Product What the TDS Says?
A test report describes a sample; a TDS describes a grade. Neither proves what is in your shipment. How FTIR, DSC, MFR, density, and ash testing verify resin — and why plastics has no per-lot certificate.
June 11, 2026
Which Products Require CPSC eFiling? Reading the ~600 HTS Code List
CPSC's ~600 HTS code list flags products that likely need eFiling, but coverage depends on the safety rule, not the code. How to read the list correctly.
A question the guides don't answer?
The guides and checkers are free and cover the common cases. If your situation doesn't fit — an unusual product, a document you're not sure about — write to us and we'll tell you straight what it needs, or that we're not the right team for it.
About CertDesk. CertDesk is operated by Kantor Materials. We help importers verify materials, coordinate accredited testing, and prepare compliance documentation. We never supply the products we review.
This page is general information for importers and sellers, not legal advice. Regulations change; confirm requirements against official sources or qualified counsel before acting.