Self-Declaration of Conformity — Manufacturer’s Direct EU Compliance Route
Self-Declaration of Conformity (also called self-certification or manufacturer’s declaration) is the conformity assessment route where the manufacturer itself evaluates whether its product complies with all applicable EU legislation — without mandatory involvement of a third-party Notified Body — and issues the EU Declaration of Conformity (DoC) to demonstrate that compliance.
It is the most widely used conformity assessment route for CE marking. Most consumer electronics, IoT devices, radio equipment, and embedded hardware products are eligible for self-declaration. However, self-declaration does not mean “self-policed” — it requires rigorous internal testing, complete technical documentation, and carries full legal liability for the manufacturer.
Key Facts
| Detail | Information |
|---|---|
| Also known as | Self-certification, Module A (Internal Production Control), manufacturer’s declaration |
| CE marking route | Yes — affixing the CE mark follows from a successful self-declaration |
| Legal instrument | EU Declaration of Conformity (DoC) |
| Who performs assessment | The manufacturer (or an authorised representative established in the EU) |
| Third-party required? | Not mandatory — but testing labs are typically used for evidence collection |
| Applies to | Most products under RED, LVD, EMC Directive, Machinery Regulation (certain classes), GPSR |
| Does NOT apply to | High-risk product classes requiring mandatory Notified Body involvement |
How Self-Declaration of Conformity Works
The self-declaration process follows a defined legal structure — it is not simply the manufacturer saying “we think it’s safe.” It involves:
Step 1: Identify Applicable Directives and Regulations
Determine which EU legislation applies to the product. A Wi-Fi module, for example, may fall under:
- Radio Equipment Directive (RED, 2014/53/EU)
- Low Voltage Directive (LVD, 2014/35/EU)
- EMC Directive (2014/30/EU)
- RoHS Directive (2011/65/EU)
- GPSR (EU 2023/988) — for consumer-facing products
Each directive must be addressed in the self-declaration.
Step 2: Identify and Apply Harmonised Standards
Harmonised standards, published in the Official Journal of the EU, provide presumption of conformity: if the product complies with a harmonised standard, it is legally presumed to comply with the corresponding requirement of the directive.
Applying harmonised standards is what makes self-declaration practical — without them, the manufacturer would need to demonstrate conformity against the raw regulatory text, which is rarely feasible.
Step 3: Test the Product Against the Standards
The manufacturer must obtain technical evidence that the product meets each applicable standard. This is typically done through:
- Accredited external test laboratories — For electromagnetic compatibility (EMC), radio, and electrical safety tests, accredited labs issue test reports that form part of the technical file.
- Internal test facilities — For some tests (e.g., basic functional verification), manufacturers with qualified internal labs can perform testing themselves.
- Standards body documentation — For some requirements, applying a design checklist from the standard may be sufficient evidence.
Critical point: The manufacturer bears full legal liability for the self-declaration. If a product later causes harm and the technical file is found inadequate, the manufacturer — not the test lab — is legally responsible.
Step 4: Compile the Technical File
The technical file is the documentary evidence that the product meets all applicable requirements. It must include:
- Product description and intended use
- List of applicable directives, regulations, and harmonised standards
- Design drawings, schematics, and BOM (Bill of Materials)
- Risk assessment results
- Test reports and test results
- Description of design solutions to meet essential requirements
- Copy of the EU Declaration of Conformity
The technical file must be kept for 10 years after the last product is placed on the market, and must be made available to market surveillance authorities on request.
Step 5: Issue the EU Declaration of Conformity
The EU Declaration of Conformity (DoC) is a formal legal document in which the manufacturer takes sole responsibility for the product’s conformity. It must contain:
- Manufacturer’s name and address
- Product identification (model, type, batch/serial number)
- Statement of conformity (“This product is in conformity with…”)
- List of applicable directives and harmonised standards
- Date, place, and signature of the authorised signatory
- Name and title of the authorised person
The DoC must be issued in at least one official EU language.
Step 6: Affix the CE Mark
Once the DoC is issued and the technical file is complete, the manufacturer affixes the CE mark to the product and/or its packaging.
Self-Declaration vs. Third-Party Assessment (Notified Body)
Not all products are eligible for self-declaration. EU legislation assigns products to conformity assessment modules — the module determines whether self-declaration is permitted or whether a Notified Body must be involved.
| Product Class | Route | Notified Body Required? |
|---|---|---|
| Most consumer electronics (LVD, EMC, RoHS) | Module A — Self-declaration | ❌ No |
| Radio equipment (RED) — harmonised standard applied | Module A — Self-declaration | ❌ No |
| Radio equipment (RED) — no harmonised standard | Module H or EU-type examination | ✅ Yes |
| Medical devices (Class I) | Module A variant | ❌ No |
| Medical devices (Class IIa/IIb/III) | Multiple modules | ✅ Yes |
| Machinery (non-Annex IV) | Self-declaration | ❌ No |
| Machinery (Annex IV — dangerous machinery) | Notified Body | ✅ Yes |
| CRA — Default class products | Self-declaration | ❌ No |
| CRA — Important Class II products | Third-party assessment | ✅ Yes |
What Self-Declaration Does NOT Mean
Self-declaration is frequently misunderstood. It does not mean:
- ❌ No testing required — Rigorous testing is always required; the manufacturer simply performs or commissions the testing itself rather than having a Notified Body do it.
- ❌ No documentation required — A complete technical file is mandatory.
- ❌ Lower safety standards — The product must meet identical essential requirements regardless of the conformity route.
- ❌ No liability — The manufacturer assumes full legal liability for the declaration. Authorities can investigate, audit, and require recall if the declaration is found to be inaccurate.
- ❌ “Self-policed” — Market surveillance authorities actively check products. They can require manufacturers to produce technical files and can initiate enforcement actions.
The Role of Accredited Test Laboratories
While self-declaration does not require a Notified Body, manufacturers almost always use accredited test laboratories to generate the test evidence for the technical file. This is important to understand:
- Accredited lab (e.g., CETECOM, SGS, TÜV, Bureau Veritas) — Issues test reports demonstrating conformity with specific standards (e.g., EN 303 645, ETSI EN 301 489, IEC 62368). The lab is not certifying the product; it is providing test evidence.
- Notified Body — A more formally designated body that performs an independent conformity assessment of the product design and/or manufacturing process. Required only for specific modules and product classes.
For most radio equipment under RED with harmonised standards applied, the self-declaration route with accredited lab testing is sufficient.
Self-Declaration and Market Surveillance Risk
Products placed on the EU market via self-declaration are subject to active market surveillance by national authorities:
- Authorities can request the technical file at any time during the 10-year retention period.
- Products can be subject to independent testing by market surveillance bodies.
- If non-conformity is found, authorities can require:
- Correction of the product (if possible)
- Recall from the market
- Prohibition on further sales
- Public notification of the non-conformity
- Administrative fines (amounts set by member state law)
A technically deficient self-declaration that is discovered post-market is significantly more costly than investing in rigorous pre-market testing.
Related Terms
- Declaration of Conformity — The formal document issued as the output of the self-declaration process.
- CE Marking — The visible result of a completed self-declaration; CE mark can only be affixed after DoC is issued.
- Conformity Assessment — The overarching process of which self-declaration is one route.
- Technical File — The documentary backbone of any self-declaration; must be complete before the DoC is issued.
- Notified Body — The third-party alternative when self-declaration is not permitted for a product class.
- Module A — The formal name for the self-declaration conformity assessment module in EU legislation.
Inovasense supports hardware manufacturers through the complete self-declaration process — from applicable directive mapping and harmonised standard selection to technical file compilation and EU Declaration of Conformity preparation. We identify which standards apply, commission accredited laboratory testing where needed, and ensure the technical file is audit-ready before the CE mark is affixed. See our EU Compliance services.