EU Court of Justice Re-confirms the Possibility to Disregard Certificate of Coverage for Posted Workers
July 18, 2018

Countries / Territories
- π
Related contacts

Client Engagement Director Europe
Related offices
Related contacts

Client Engagement Director Europe
Related offices
Related contacts

Client Engagement Director Europe
Related offices
By: Wim Cocquyt, Kristine Zaiceva
The Court of Justice of the European Union (hereafter CJEU) has re-confirmed its position regarding the validity of a Certificate of Coverage also commonly known as a CoC or an A1 certificate. The CJEU has stated that in case the host country has reasonable and concrete doubts regarding the conditions under which the A1 certificate was issued and the country that issued the A1 certificate refuses to reconsider these concerns the courts of the host country may decide to disregard the certificate.
The request for a Certificate of Coverage (commonly known as a CoC, or an A1 certificate amongst the countries that apply the EU Regulations on social security coordination) is fundamental to ensure full compliance with social security obligations for employees that are assigned to work abroad in another EU country on a temporary basis. The A1 certificate indicates in which country social security contributions are being paid and it should be kept available to be presented to the competent institution in the country where the assignee is temporarily working, to confirm the social security position of the employees concerned.
What is interesting about this judgement is that, on the one hand, it emphasizes again, as per consolidated case law, that an A1 certificate is binding to the host countryβs authorities, as long as the certificate is not withdrawn by a competent institution of the issuing country.
On the other hand, however, as it also was stated in a recent CJEU decision of last February, that the national courts of the host country may disregard an A1 certificate in case it was issued fraudulently and the issuing institution of the home country is not willing to withdraw it. Please find more details about the recent CJEU decision regarding this particular judgement in one of our previous blogs here.
With the judgment of July 11th, 2018 (case C-356/15), the CJEU has ruled that Belgium infringed the EU Regulations on social security by introducing rules in national legislation that do not meet the principles and requirements of the EU Regulations.
According to current Belgian legislation, where the national court, a public social security institution or a social inspector establishes there has been an abuse in the issuance of an A1 certificate by a given home country, the worker involved should be made subject to Belgian social security legislation.
What is notable about this judgment is that the CJEU has clearly stated that if a host Member State adopts legislation authorizing its own institutions to unilaterally declare an A1 certificate invalid, the principle of sincere cooperation between the competent institutions of the Member States would be jeopardised.
Consequently, the power to make a finding of fraud and to disregard an A1 certificate is limited to the national courts alone, only after the whole procedure of dialogue and conciliation, as laid down in the EU Regulations, has been followed and executed.
The Fragomen Social Security team is prepared to guide clients to optimise their social security programs and reduce related costs. Our strategic approach will help you plan ahead and ensure social security compliance from day one. For any social security related question, please feel free to contact us at [email protected] .
Countries / Territories
- π
Related contacts

Client Engagement Director Europe
Related offices
Related contacts

Client Engagement Director Europe
Related offices
Related contacts

Client Engagement Director Europe
Related offices
Explore more at Fragomen

Video
Afzal Amin highlights a significant update for UAE Golden Visa holders: the Jebel Ali Free Zone authorities have replaced permanent access cards with permanent identity cards.

Blog post

Blog post
Associate Pauline Chomel and Immigration Consultant Pebbless Agyemang discuss Belgiumβs new family reunification rules and their impact on applicants.

Media mentions
Senior Associate Oliver L. Ashworth and Director David Iannella discuss recent US immigration and visa changes and what German businesses and travelers should know.

Media mentions
Senior Manager Louise Senior highlights how UK hospitality employers face heightened risk as visa sponsors and why it is important for them to understand their responsibilities to avoid penalties.

Fragomen news
Fragomen announces the expansion of Nomadic to the Nordics, providing end-to-end support for short-term business travel and cross-border compliance.

Blog post
Immigration Supervisor Michael Salas Guzman discusses Costa Rica investment residency options and requirements for foreign investors, retirees and rentiers.

Media mentions
Managing Partner for the Middle East and Africa Murtaza Khan discusses why immigration due diligence is important in GCC mergers.

Fragomen news
Fragomen announces the opening of new offices in WrocΕaw and GdaΕsk, welcoming Partner Karolina Schiffter to its Poland practice.

Blog post
This blog post by Manager Virginie Todesco and Immigration Consultant Chiara Caredda, available in English and Portuguese, outlines the requirements, benefits and application process for obtaining Luxembourg citizenship.

Awards
Fragomen and Regional Partner for the Asia Pacific Mark Buchanan were recognized at the 2025 FEM APAC EMMAs.

Awards
Partner Archana Iyer won the "Innovation Award" at The New York Law Journal's 2025 New York Legal Awards.

Video
Afzal Amin highlights a significant update for UAE Golden Visa holders: the Jebel Ali Free Zone authorities have replaced permanent access cards with permanent identity cards.

Blog post

Blog post
Associate Pauline Chomel and Immigration Consultant Pebbless Agyemang discuss Belgiumβs new family reunification rules and their impact on applicants.

Media mentions
Senior Associate Oliver L. Ashworth and Director David Iannella discuss recent US immigration and visa changes and what German businesses and travelers should know.

Media mentions
Senior Manager Louise Senior highlights how UK hospitality employers face heightened risk as visa sponsors and why it is important for them to understand their responsibilities to avoid penalties.

Fragomen news
Fragomen announces the expansion of Nomadic to the Nordics, providing end-to-end support for short-term business travel and cross-border compliance.

Blog post
Immigration Supervisor Michael Salas Guzman discusses Costa Rica investment residency options and requirements for foreign investors, retirees and rentiers.

Media mentions
Managing Partner for the Middle East and Africa Murtaza Khan discusses why immigration due diligence is important in GCC mergers.

Fragomen news
Fragomen announces the opening of new offices in WrocΕaw and GdaΕsk, welcoming Partner Karolina Schiffter to its Poland practice.

Blog post
This blog post by Manager Virginie Todesco and Immigration Consultant Chiara Caredda, available in English and Portuguese, outlines the requirements, benefits and application process for obtaining Luxembourg citizenship.

Awards
Fragomen and Regional Partner for the Asia Pacific Mark Buchanan were recognized at the 2025 FEM APAC EMMAs.

Awards
Partner Archana Iyer won the "Innovation Award" at The New York Law Journal's 2025 New York Legal Awards.