A Declaration of Conformity is the manufacturer stating, under their own responsibility, that a product meets specific standards. That is a real legal commitment — and it is a different thing from a laboratory certificate, which is why the two should never be described interchangeably.
Read the model list first. Then the standards, then the date, then the signature. If the declaration lists a family and you are buying a variant, ask which report covers your variant specifically.
If anything on the declaration contradicts the product specification you were sent, stop and resolve it before the sample is approved. Contradictions found after production are expensive.
Use this checklist
- Identify the responsible manufacturer or applicant
- Compare the model strings against what you are ordering
- Check the standards, the dates and the signature
- Ask for the supporting test reports where they matter