The EU Declaration of Conformity is one of the most important legal documents in the CE marking process. By issuing and signing it, the manufacturer formally assumes responsibility for the conformity of the identified product with the applicable European Union harmonisation legislation.
The Declaration is often treated as an administrative document prepared at the end of a certification project. In reality, it should represent the conclusion of a complete conformity-assessment process involving product classification, identification of applicable legislation, risk assessment, standards selection, testing, technical documentation and, where required, third-party conformity assessment.
A correctly prepared Declaration therefore creates a direct connection between the physical product placed on the European market and the technical evidence supporting its conformity.
Errors in this document can reveal deeper weaknesses in the conformity process. Incorrect Directive references, obsolete standards, mismatched model numbers, missing Notified Body information or an unauthorised signature can create questions about whether the product was properly assessed at all.
The challenge becomes greater for multifunctional products. A single machine or electrical product can be subject to several pieces of Union harmonisation legislation simultaneously, requiring the manufacturer to ensure that the Declaration reflects the complete applicable regulatory framework.
This GAR Insight explains what the EU Declaration of Conformity represents, when it is required, what information it should contain, how legislation and standards should be referenced, how multiple Directives and Regulations should be handled and how manufacturers can avoid the most common declaration errors.
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Explore the legal purpose, required content, preparation, signature, control and maintenance of the EU Declaration of Conformity.
What Is an EU Declaration of Conformity?
The EU Declaration of Conformity is a formal document through which the manufacturer declares that an identified product fulfils the applicable requirements of the relevant Union harmonisation legislation.
It is not simply a certificate showing that a laboratory has tested the product. It is the manufacturer’s own legal declaration of conformity, supported by the technical documentation and conformity assessment completed for that product.
When Is an EU Declaration of Conformity Required?
The requirement to draw up an EU Declaration of Conformity comes from the applicable Union harmonisation legislation. Manufacturers should therefore establish the product’s complete regulatory framework before preparing the declaration.
Many CE marking frameworks require an EU Declaration of Conformity, including legislation covering machinery, electrical equipment, electromagnetic compatibility, radio equipment, pressure equipment, personal protective equipment and other regulated products.
Identify the Product
Define the finished configuration, model, intended use and relevant technical characteristics.
Determine Applicable Legislation
Establish which EU Directives and Regulations govern the product.
Complete Conformity Assessment
Perform the required assessment, testing and third-party procedures where applicable.
Issue the Declaration
Prepare and sign the EU DoC after conformity has been established.
Who Is Responsible for the Declaration?
The manufacturer has the central responsibility for ensuring that the product has been designed and manufactured in accordance with applicable requirements and for drawing up the required conformity documentation.
An authorised representative may perform certain tasks where permitted and where those tasks are included within a valid written mandate. The exact responsibilities must always be checked against the applicable legislation.
Manufacturer
Establishes conformity, maintains the required technical evidence and issues the declaration under the responsibilities established by the applicable legislation.
Authorised Representative
May perform specified regulatory tasks on behalf of the manufacturer where permitted and expressly covered by the written mandate.
What Information Should the Declaration Contain?
The precise model of the EU Declaration of Conformity should be checked against the applicable legislation. However, modern EU product legislation commonly requires a structured set of information that clearly identifies the product, responsible manufacturer, applicable legislation and basis of conformity.
Product Identification Must Be Unambiguous
The declaration must be connected clearly to the product for which conformity has been established. Ambiguous descriptions such as “electrical equipment” or “machine” may not provide adequate traceability.
Product Name
State the commercial or technical product designation consistently.
Model / Type
Identify model, type, family or other designation relevant to the assessed configuration.
Variant
Ensure covered variants are clearly identified and supported by the technical evidence.
Serial Information
Include serial, batch or other identifiers where required or appropriate.
Product Image
An image can provide additional identification where appropriate and consistent with the applicable declaration model.
Technical File Link
Internal document control should allow the declaration to be traced to the correct technical documentation.
Identifying Applicable EU Directives & Regulations
The Declaration should identify the Union harmonisation legislation applicable to the product. This requires the regulatory classification to have been completed before the document is drafted.
| Product Characteristic | Example EU Legislation | Declaration Consideration |
|---|---|---|
| Electrical Safety | Directive 2014/35/EU | Include where the Low Voltage Directive applies. |
| Electromagnetic Compatibility | Directive 2014/30/EU | Include where EMC legislation applies. |
| Radio Equipment | Directive 2014/53/EU | Include where the product falls within RED. |
| Pressure Equipment | Directive 2014/68/EU | Include where PED conformity applies. |
| Explosive Atmospheres | Directive 2014/34/EU | Include for applicable ATEX equipment. |
| Restricted Substances | Directive 2011/65/EU | Include RoHS where applicable to the EEE. |
| Personal Protective Equipment | Regulation (EU) 2016/425 | Include for products within the PPE Regulation. |
| Machinery | Applicable EU machinery legislation | Verify the legislation and transition applicable when the product is placed on the market. |
How to Reference Standards Correctly
Standards listed on the Declaration should correspond with the conformity assessment actually carried out for the product and with the technical documentation supporting the declaration.
Where harmonised standards are used to provide a presumption of conformity, manufacturers should verify the relevant standard reference and its status under the applicable Union legislation.
Correct Standard Number
Verify that the referenced EN or EN IEC designation corresponds with the standard actually applied.
Correct Edition
Ensure the edition or amendment cited corresponds with the conformity evidence and applicable regulatory context.
Correct Product Scope
Confirm that the standard is relevant to the specific product and characteristics assessed.
Evidence Alignment
Test reports, risk assessments and technical records should support the standards referenced on the declaration.
When Should a Notified Body Be Identified?
Certain conformity-assessment procedures require the participation of a Notified Body. Where the applicable declaration model requires that information, the relevant Notified Body and conformity-assessment activity should be identified correctly.
Notified Body Name
Use the correct legal identity of the conformity assessment body.
Identification Number
Include the Notified Body identification number where required by the applicable legislation.
Procedure Performed
Identify the relevant conformity-assessment procedure accurately.
Certificate Reference
Include the relevant certificate or assessment reference where the declaration model requires it.
One Product — Multiple EU Legislation — One Coherent Declaration
A product can be subject to several pieces of Union harmonisation legislation requiring an EU Declaration of Conformity. In such cases, the manufacturer should ensure that the declaration covers the complete applicable regulatory framework.
Define the exact finished configuration.
Identify all applicable EU harmonisation acts.
Complete the required conformity assessments.
Consolidate the applicable conformity framework.
Affix the mark after requirements are fulfilled.
Signature — More Than an Administrative Formality
The signature completes the formal declaration by an individual authorised to act for the manufacturer or other responsible entity as permitted by the applicable legislation.
The document should contain the place and date of issue together with the signatory information required by the applicable declaration model.
Name
Identify the individual signing for and on behalf of the responsible organisation.
Function
State the signatory’s relevant position or authority where required.
Signature
Execute the declaration using an appropriate authorised signature.
Place
State the place of issue where required by the applicable model.
Date
Record when the Declaration was issued.
Authority
Ensure the person signing has appropriate organisational authority.
Language, Availability & Retention
Drawing up the Declaration is not the end of the manufacturer’s document-management responsibility. Applicable legislation can establish requirements concerning language, retention and availability to market surveillance authorities.
Language
Verify applicable language or translation requirements for the Member State in which the product is placed or made available.
Retention
Keep the Declaration for the period prescribed by the applicable Union harmonisation legislation.
Authority Access
Ensure the Declaration can be made available to competent market surveillance authorities as required.
Version Control
Maintain controlled copies so obsolete declarations are not confused with the current product configuration.
When Should the Declaration Be Reviewed or Updated?
The Declaration should remain aligned with the actual product, applicable legislation and conformity evidence. Changes affecting any of these elements should trigger an appropriate review.
Product Design Changes
Changes affecting safety, performance or regulated characteristics can require conformity reassessment.
New Product Variants
Confirm that new models are genuinely covered by existing technical evidence before adding them to a declaration.
Legislative Changes
New or amended EU legislation can change the applicable conformity framework.
Standards Changes
Review changes to relevant harmonised standards and determine their effect on conformity evidence.
Notified Body Changes
Where third-party assessment information changes, the declaration may require corresponding revision.
Manufacturer Changes
Changes affecting the responsible legal entity or required contact information should be controlled appropriately.
Common EU Declaration of Conformity Errors
Wrong Product Model
The declaration identifies a model or configuration different from the product actually supplied.
Missing Legislation
One or more applicable EU harmonisation acts are omitted from the declaration.
Irrelevant Legislation
Directives are copied from another product without a valid applicability assessment.
Incorrect Standards
Referenced standards do not correspond with the actual test reports or technical assessment.
Obsolete References
Old legal references or standards remain on the document after the conformity basis has changed.
Missing Notified Body Details
Required third-party conformity information is incomplete or incorrectly presented.
Unsigned Declaration
The document is distributed without the required authorised execution.
No Technical Evidence
A declaration exists, but the manufacturer cannot produce the technical documentation supporting its statements.
From Product Assessment to Signed Declaration
A reliable EU Declaration of Conformity should be generated from a controlled conformity process rather than prepared independently as an administrative form.
Define Product
Establish the exact product, model, variants and intended use.
Map Legislation
Identify all applicable Union harmonisation legislation.
Identify Requirements
Determine applicable essential or other legal requirements.
Select Standards
Establish the appropriate standards and technical specifications.
Assess Risks
Complete the required product risk assessment.
Test Product
Generate appropriate technical and laboratory evidence.
Complete Third-Party Assessment
Obtain Notified Body involvement where legally required.
Build Technical File
Consolidate engineering and conformity evidence.
Verify Product Identity
Match labels, model references and assessed configuration.
Draft EU DoC
Prepare the declaration using the applicable legal model.
Technical Review
Cross-check legislation, standards and supporting evidence.
Authorise & Sign
Issue the controlled declaration under appropriate authority.
The Declaration Is the Legal Summary of the Conformity Process
The EU Declaration of Conformity may be only a few pages — or even a single page in some cases — but the technical and regulatory process behind it can be extensive.
Every important statement on the Declaration should be traceable. The product description should correspond with the equipment placed on the market. The legislation should correspond with a documented applicability assessment. The standards should correspond with the technical evidence. Notified Body references should correspond with actual conformity-assessment activities. The signature should represent properly authorised responsibility.
For combined products, the importance of this discipline increases. Electrical safety, EMC, radio, machinery, pressure, ATEX, RoHS and other requirements can intersect within a single finished product. The Declaration should bring the applicable Union harmonisation requirements together into a coherent statement supported by the technical file.
The objective is therefore not merely to produce a document called an “EU Declaration of Conformity.” The objective is to ensure that the declaration is an accurate legal summary of a conformity process that can withstand technical review and market-surveillance scrutiny.
The Traceability Question
Can every product model, legislative reference, standard and conformity-assessment statement appearing on the Declaration be traced directly to supporting technical documentation?
The Responsibility Question
Can the manufacturer demonstrate that the person signing the Declaration had a complete and technically supported basis for declaring the product compliant?