CE Declaration of Conformity vs CE Marking

People use “CE mark,” “CE certificate,” and “Declaration of Conformity” as if they were interchangeable. They are not — and for most products, one of them does not even exist. Getting the distinction right matters, because the wrong assumption leaves you without the one document an auditor, a customer, or a market surveillance authority will actually ask for.

This guide explains what each term means, who issues what, what a CE Declaration of Conformity has to contain, and how to tell a legally required document from a commercial certificate that carries no legal weight.

The short answer

CE marking is not a certification. It is a declaration by the manufacturer that the product meets the EU legislation that applies to it. The document behind that declaration is the EU Declaration of Conformity (DoC). A certificate only enters the picture where the legislation requires an independent Notified Body to assess the product.

What the CE mark is — and is not

The CE marking is the visible, public-facing signal that the manufacturer declares the product conforms with all the EU legislation that applies to it. On its own the mark carries no detail: it points to the documentation behind it. Its legal basis is Regulation (EC) No 765/2008, which sets out the general principles of CE marking, and the sector-specific directives and regulations that decide which products must carry it.

Three misconceptions cause most of the confusion:

• It is not a quality mark. CE marking means the product meets legal minimum requirements for health, safety and environmental protection — not that it is well made.
• It is not issued by an authority. No government body hands out the CE mark. The manufacturer applies it after assessing conformity and signing the Declaration of Conformity.
• It is not a certificate. The mark is a symbol. The evidence sits in the technical file and the Declaration of Conformity, which is why “show me your CE certificate” is usually the wrong question.

For the wider picture — which products need the mark, harmonised standards, and the six-step process — see the complete CE marking guide.

What the EU Declaration of Conformity is

The EU Declaration of Conformity (often written DoC, or “CE declaration of conformity”) is the legal document in which the manufacturer declares, on its sole responsibility, that a product complies with the EU legislation that applies to it. Drawing it up is one of the manufacturer’s formal obligations; without a signed DoC, the CE marking may not be affixed and the product may not be placed on the EEA market.

If a customer, importer, or authority asks you to “prove CE compliance,” this is the document they are asking for.

What a CE Declaration of Conformity must contain

The model declaration in Annex III of Decision No 768/2008/EC sets the structure that most sector legislation follows. A compliant EU DoC identifies:

• The product — model, type, batch or serial number, described precisely enough to trace it to the physical item (an image may be included).
• The manufacturer — name and address, and the authorised representative where one is used.
• The responsibility statement — the wording “This declaration of conformity is issued under the sole responsibility of the manufacturer.”
• The legislation — each EU directive or regulation the product conforms to, cited by title and reference.
• The standards — the harmonised standards or other technical specifications applied, including their dates or versions.
• The Notified Body, where one was involved — its name, four-digit identification number, what it did (for example an EU-type examination), and the certificate it issued.
• The signature — place and date of issue, the name and function of the signatory, and their signature for and on behalf of the manufacturer.

A single declaration can cover several pieces of legislation at once. Where a product falls under, say, the Low Voltage, EMC and RoHS rules, one DoC lists all three rather than issuing three separate declarations.

EU declaration vs EC declaration of conformity

You will see both “EC Declaration of Conformity” and “EU Declaration of Conformity.” They are the same kind of document. Older directives — for example the Machinery Directive 2006/42/EC — use the “EC” wording; directives aligned with the New Legislative Framework from 2014 onward use “EU.” Use whichever wording the legislation you are declaring against uses, and do not treat the two as different documents.

Who signs it, and in which language

The declaration is signed by a person authorised to bind the manufacturer — typically a director, a quality or compliance manager, or the authorised representative established in the EU. It has to be translated into the language or languages required by the member state where the product is made available, so a product sold across the EEA usually needs the DoC in several languages.

Some sector legislation requires the DoC to physically accompany the product (the Machinery Directive is the best-known example); other legislation requires it to be kept available and supplied on request. Check the directive that applies to you.

When a “CE certificate” exists — and when it doesn’t

Here is the part that trips people up: for most products there is no CE certificate at all. Whether one exists depends on the conformity assessment route the legislation prescribes for the product’s risk class.

Self-declaration: the route most products take

Where the legislation allows it, the manufacturer assesses conformity itself under internal production control (Module A in the EU framework). The manufacturer tests against the relevant harmonised standards, compiles the technical file, signs the Declaration of Conformity and affixes the CE mark — with no third party issuing anything. This is what is meant by “CE self-declaration” or “CE self-certification.” It is the norm for most machinery, electrical equipment, and consumer products.

Notified Body certificates: the higher-risk route

For higher-risk products, the legislation requires an independent Notified Body — a conformity assessment body designated by an EU member state — to take part. Depending on the module, it may examine the design (issuing an EU-type examination certificate), approve the manufacturer’s quality system, or verify each unit. Its four-digit number then appears beside the CE marking. Typical examples include certain pressure equipment, personal protective equipment, medical devices, equipment for explosive atmospheres, and lifts.

Even in this case the Declaration of Conformity is still required. The Notified Body certificate supports the declaration; it does not replace it.

Commercial “CE certificates” from test labs

Private test houses and consultancies often issue documents titled “CE Certificate,” “Certificate of Conformity,” or “Certificate of Compliance” after testing a product. These can be genuinely useful — they are evidence for the technical file — but they are not required by EU law and they do not, on their own, make a product CE compliant. Only the manufacturer’s signed Declaration of Conformity does that. Treat a commercial certificate as supporting evidence, never as the compliance document itself.

Declaration of conformity vs certificate of conformity vs certificate of compliance

Because the terms get mixed up on purchase orders and supplier questionnaires, it helps to pin them down:

The rule of thumb: a declaration is something the manufacturer signs on its own responsibility; a certificate is something a third party issues. Under CE marking, the declaration is the compliance document; certificates are evidence.

How long you must keep the declaration

The Declaration of Conformity and the technical documentation must be kept at the disposal of market surveillance authorities — typically for ten years after the product is placed on the market, with some sector legislation (medical devices, for instance) requiring longer. The obligation continues after the product ships: when the product changes, when the applicable standards are revised, or when a Notified Body certificate expires and is renewed, the declaration has to be updated to match.

Importers carry a parallel duty. They must verify that the manufacturer has drawn up the DoC and the technical documentation, and must keep a copy of the declaration available for the same period.

Managing declarations and certificates at scale

Declarations of Conformity and Notified Body certificates pile up quickly: one per product family, revised with each design change, plus the supplier DoCs for every certified component you build in. The failure mode is always the same — the current version lives in someone’s inbox, the superseded one on the shared drive, and neither is linked to the product it covers.

A certificate management platform fixes that structurally: each Declaration of Conformity and certificate is stored against the product record it belongs to, Notified Body certificate expiries are tracked with expiration tracking, and component DoCs are collected from suppliers through supplier collaboration rather than chased by email. The CE marking guide sets out where each document fits in the wider process, and CE Marking Requirements walks through the six steps to get there.