Paper CoC Is Not Enough: The EU eCoC Mandate Explained for Chinese Automakers

For vehicle manufacturers, importers and dealers exporting to the EU, a change that is easy to overlook — but far-reaching in impact — is now imminent.

From 5 July 2026, in addition to the paper Certificate of Conformity (CoC), manufacturers must simultaneously provide an electronic eCoC for each vehicle, and submit it in specific circumstances as a mandatory requirement.

The paper CoC will not be abolished. But the absence of an eCoC will prevent a vehicle from completing CO₂ certification and several other critical compliance steps.

01 What Is the CoC and Why Does It Matter?

The CoC (Certificate of Conformity) is the legal document issued by the manufacturer for every individual vehicle, confirming that the vehicle:

Meets all applicable technical requirements;
Complies with EU administrative rules;
Fully conforms to the vehicle type for which type approval was granted.

In the EU market, the CoC is the foundational legal document for lawful sale, first registration, and CO₂ emissions compliance.

Any change to autonomous driving features or software that affects the vehicle type must be covered by the type approval and accurately reflected in the CoC. Inconsistencies constitute a legal violation with serious consequences.

02 Paper CoC and Electronic eCoC: Two Obligations, Two Purposes

Under EU Regulation 2018/858:

Article 36: Manufacturers who have completed type approval must issue a paper CoC for every vehicle manufactured and deliver it to the buyer.
Article 37: Manufacturers must also generate an electronic eCoC (a structured dataset) for every vehicle and transmit it to the approval authority.

In other words: the paper CoC and the electronic eCoC are parallel obligations — neither replaces the other.

03 What Exactly Changes from 5 July 2026?

Under EU 2018/858 and its implementing acts:

The CoC must be provided in both paper and electronic (eCoC) format simultaneously;
After vehicle production, manufacturers must transmit the eCoC to the type-approval authority without undue delay and free of charge;
eCoC data must be accessible to type-approval authorities, registration bodies, and market surveillance authorities in all member states.

Exceptions:

Small-series vehicles and certain special categories (such as agricultural vehicles or trailers) may be exempt from some requirements under specific conditions;
National authorities may still request a paper copy in special circumstances, but the electronic eCoC is now part of the statutory standard.

04 What Is Each Format Used For? When Is Each Required?

Many assume that having a paper CoC is sufficient. This is a dangerous misconception.

Document	Primary Use	Mandatory?
Paper CoC	First registration by the buyer	Yes — without it, registration is impossible
Electronic eCoC	CO₂ emissions certification, institutional data sharing, compliance audit	Yes — without it, vehicles cannot pass emissions certification

Key conclusions:

No paper CoC → buyer cannot register the vehicle.
No electronic eCoC → vehicle cannot participate in CO₂ emissions certification and cannot be properly audited by regulators.

Both are indispensable. Neither can substitute for the other.

05 Why Is the EU Making eCoC Mandatory?

This transition is driven by multiple factors:

Efficiency and data interoperability: Structured electronic data enables automated verification and seamless cross-border sharing between member states.
Accuracy and anti-counterfeiting: Reduces human error and makes it easier to detect discrepancies between vehicle specifications and CoC data.
Anti-fraud and compliance auditing: Digital signatures, version control, and centralised storage substantially strengthen regulatory oversight.
Alignment with the CO₂ monitoring framework: Emissions certification requires machine-readable data — paper documents cannot meet this requirement.

06 The Consequences of Data Falsification: Lessons from Dieselgate

A critical warning: if a vehicle's actual characteristics do not match the information in its CoC, this may constitute fraud.

No paper CoC → cannot register.
No electronic eCoC → cannot pass CO₂ certification.
Data inconsistency → administrative, civil and criminal legal risk.

As the Volkswagen Dieselgate scandal demonstrated, such violations can result in tens of billions of euros in fines and compensation. The introduction of eCoC is designed precisely to close the gap between paper compliance and real-world conformity — at the data source.

07 What Must Manufacturers and Importers Do?

To meet the deadline, organisations should act immediately:

Upgrade IT systems: Build the capability to generate eCoC in structured electronic format (XML) with an XAdES digital signature compliant with the EU eIDAS standard.
System integration: Ensure eCoC can be transmitted seamlessly to type-approval authorities and national registration bodies. Submit an onboarding application to the National Access Point (NAP) of each target member state.
Process transformation: Train staff, establish parallel paper-and-electronic workflows, and ensure data consistency between the two formats at all times.
Engage local authorities: Clarify each member state's transition arrangements and specific submission requirements.
Maintain a paper backup process: For situations where additional paper copies may be required, establish a robust archiving and re-issuance procedure.

Note: Obtaining a Qualified eSeal certificate from a European Qualified Trust Service Provider (QTSP) typically requires 4 to 8 weeks for legal entity identity verification. This is the single most time-constrained step in the entire preparation process and must be initiated as the top priority.

08 What Happens If You Miss the Deadline?

Failure to provide a compliant eCoC may result in:

CO₂ certification failure: vehicles cannot enter or remain in the EU market;
Registration blocked: some member states may treat eCoC submission as a prerequisite for first registration;
Additional costs and penalties: retroactive data correction or remediation, and potential legal sanctions.

09 Timeline at a Glance

Milestone	Key Change
From 5 July 2026	Manufacturers of M, N and O category vehicles must provide electronic eCoC alongside the paper CoC
Before July 2026	Organisations must complete system upgrades, process changes, staff training, and authority onboarding
After July 2026	Both paper and electronic formats run in parallel; absence of either will affect vehicle compliance status

10 Conclusion: Paper Is Not Enough — Electronic Is Equally Essential

From 2026 onwards, EU vehicle compliance formally enters a dual-track regime:

Paper CoC = the passport for vehicle registration

Electronic eCoC = the passport for emissions certification and regulatory compliance

Both are required. Any organisation that has prepared only one of the two will face market access barriers in the EU.

eCoCSign Services

eCoCSign provides an end-to-end eCoC solution for Chinese manufacturers exporting to the EU, covering data collection, XML generation, XAdES electronic signing, and NAP integration for EU member states. To learn more or schedule a free compliance diagnostic, please contact us.