A COA, COC, Declaration of Compliance and test report are not interchangeable “certificates.” Their names also vary by issuer. Decide what question must be answered, then inspect identity, scope and authority inside the file.
Match document to question
| Document | Typical question | Do not assume |
|---|---|---|
| COA | What results are reported for this lot/sample? | Complete regulatory compliance |
| COC | What specification does the issuer state is met? | Independent testing occurred |
| DoC | What regulatory declaration and restrictions apply? | One market/file covers every formulation |
| Test report | What happened to the submitted sample under listed tests? | The sample represents all lots and uses |
Check the same identity fields
Verify issuer, supplier/site, exact SKU/material/thickness/revision, lot or sample, market, intended use, referenced method/regulation, results/limits, date and change logic. The European Commission explains the role of an EU plastics DoC and supporting documentation in its official overview. FDA regulatory status follows applicable U.S. bases and conditions, not a generic “FDA certificate”; see the FDA guidance.
Keep public evidence within scope
YIYUAN’s report 202502010694 identifies a 400 mm × 0.013 mm PE submitted sample. It is not a universal COA, COC, DoC or approval for PVC, later lots or every market. Use the market document workflow to request the missing evidence for the exact product configuration.