CE Marking · Hazloc Labs

EU Declaration of Conformity: How to Write One That Survives Scrutiny

The EU Declaration of Conformity (DoC) is the manufacturer’s formal statement that a product meets applicable Union harmonization legislation. Market surveillance, customers, and importers will ask for it early. A polished PDF with the wrong standards list is worse than a plain one that matches your technical file.

What the DoC must typically include

Exact annex formats vary by directive/regulation — follow the template in the legislation that applies to your product.

Who signs

Someone with authority to bind the manufacturer. Signature implies the organization accepts legal responsibility for the statement. Distributors should not invent DoCs for products they did not manufacture unless they lawfully take on manufacturer obligations (for example by placing under their own name).

DoC and technical file stay coupled

DoC claimFile must show
Listed directivesApplicability rationale and essential-requirements coverage
Listed standardsTest reports / assessments against those editions
Product identityBOM/variants matching what you ship
NB certificate numberValid certificate covering the configuration

Common failure modes

Language and retention

Provide the DoC in the language required by the Member State where the product is placed or put into service, as applicable. Keep it with the technical file for the retention period required by law (often 10 years after placing on the market for many product families — confirm for your acts).

FAQ

Is the DoC the same as a Certificate of Conformity?

No. See our CE CoC guide. The DoC is mandatory manufacturer documentation; a CoC is usually voluntary third-party paperwork.

Can I CE mark before the DoC is signed?

Do not. Affixing CE marking implies the conformity process — including the DoC — is complete for that product.

Need a scoped path? Hazloc Labs helps teams draft DoC content that matches evidence and keep files audit-ready. Book a consultation.

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