• Insights

The Court of Justice of the European Union Reconfirms the Possibility to Disregard A1 Forms for Posted Workers

April 17, 2020

European Union

Countries / Territories

  • BelgiumBelgium
  • LuxembourgLuxembourg
  • NetherlandsNetherlands

Related offices

  • Brussels

Related content

  • Fragomen Consulting Europe

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related offices

  • Brussels

Related content

  • Fragomen Consulting Europe

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related offices

  • Brussels

Related content

  • Fragomen Consulting Europe

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

By: Kristine Zaiceva

The COVID-19 pandemic is receiving the full attention of all government authorities worldwide, and companies and employees have been forced to change existing work patterns or work locations (e.g., by introducing extensive measures of smart or remote working), which is also impacting the social security compliance.

As is widely known, certificates of social security coverage (like A1 forms in Europe) have acquired more importance recently, especially in Europe. This is due to the increased (short term) mobility, on the one hand, and the wish of many countries to monitor the immigration, employment and social security compliance for workers temporarily employed in an EU country, on the other.

In principle, a worker is subject to the social security legislation of the country of employment, unless he/she has a valid A1 certificate indicating the applicable legislation: for example, in case of a business traveller, a temporary “posting” or work activities in two or more countries at the same time. The recent enforcement measures for posted workers, as well as the new forms of EU-wide immigration permits, progressively show the need for workers to hold a valid A1 form.

In that context, the Court of Justice of the European Union (hereafter “CJEU” or “the Court”) has pronounced its judgment in the joined cases C‑370/17 and C‑37/18, better known as the Vueling-cases, and taken the opportunity to further elaborate on the binding nature of the certificate of coverage and on the conditions that need to be fulfilled before an A1 form can be disregarded by the host country.

 

Background

According to consolidated case-law of the CJEU, a certificate of social security coverage should be considered binding, as long as the certificate has not been withdrawn or declared invalid by the authorities of the issuing Member State (see e.g. case C‑620/15).

However, as a response to the above-mentioned need for countries to monitor compliance for workers in short-term mobility and to fight “social dumping,” the Court ruled in 2018 that national courts of the host country have the ability to disregard an A1 certificate, in the event it was issued fraudulently and the home country is not willing to withdraw it (see case C-359/16 commented in one of our previous blog posts here).

 

The Vueling-judgement

With the judgment of 2 April 2020, the CJEU has fine-tuned its position, clarifying that the existence of evidence of fraud cannot be sufficient for the courts of the host country to put aside an A1 certificate.

Based on the principles of sincere cooperation and mutual trust between EU Member States, the competent authority of the host country must first promptly engage in a dialogue and collaborate closely with the issuing authority in the home country, allowing the latter to review the facts and make a decision to withdraw or cancel the certificate within a reasonable timeframe.

In other words, the Court has underlined that the specific reconciliation procedure between the competent authorities of home and host country, laid down in the EU social security regulations, must always be followed. Only if that has happened, can a court of the host country draw any conclusion on a final finding of fraud, and eventually disregard an A1 form.

Whereas in previous occasions the CJEU had always followed the opinion of the Advocate-General, it now takes a clear distance from his advice to allow for a more liberal approach, by invoking the principle of legal certainty and re-confirming the value of the A1 form.

 

How Fragomen Can Help

The present Court decision shows once more the importance of obtaining A1 forms for workers who travel for business or work to another European country in accordance with the rules of the EU social security regulations.

Where A1 forms are not requested accordingly, they can be disregarded under certain conditions by the courts of the host country. Importantly, the risk of retroactive applicability of host country social security, along with significant penalties, is realistic.

Considering the growing short-term mobility, A1 forms are increasingly important documents to help monitor compliance from an immigration and posted workers perspective. In the fight against social dumping, it can be expected that host country authorities will always more closely examine the validity of A1 certificates.

For additional information and to discuss the concerns of Posted Workers and the social security impact of COVID-19 on your company, as well as to plan strategically for remobilisation and an efficient deployment of your mobile workforce following the pandemic’s emergency period, please do not hesitate to reach out to us or to your usual Fragomen immigration professional.

 

Wim Cocquyt
[email protected]
 
Kristine Zaiceva
[email protected]

Countries / Territories

  • BelgiumBelgium
  • LuxembourgLuxembourg
  • NetherlandsNetherlands

Related offices

  • Brussels

Related content

  • Fragomen Consulting Europe

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related offices

  • Brussels

Related content

  • Fragomen Consulting Europe

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Related offices

  • Brussels

Related content

  • Fragomen Consulting Europe

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Explore more at Fragomen

Podcast

Insight & Impact - Episode 2: Why Data Matters

Canada Managing Partner Cosmina Morariu and Senior Director Leah L. Rogal discuss how immigration, demographic, labor market and economic data can help organizations interpret policy developments, anticipate talent needs and make more strategic workforce and mobility decisions.

Learn more

Fragomen news

Fragomen Opens Denver Office, Strengthening Support for Colorado Employers

Fragomen opens a Denver office to expand immigration support for Colorado employers and growing businesses.

Learn more

Video

Ordinary Naturalisation in Switzerland | #MobilityMinute

Manager Mihaela Dumitru discusses key requirements for ordinary naturalisation in Switzerland, including residence, integration, language skills and local knowledge assessments.

Learn more
Generic Insights

Blog post

Pre-Settled Status and Absences From the UK: When Could Status Be at Risk?

In this blog, Immigration Consultant Mirela Sartori explains when absences could place status at risk, how the Home Office assesses residence and what to do if you receive a “minded to curtail” notice, which generally requires a response within 28 days.

Learn more

Article

Foreign Birth Registration: Mistakes That Can Delay Irish Citizenship Applications

From documentation gaps and certification errors to missed deadlines, Senior Immigration Consultant Patricia Rezmives highlights 8 common FBR pitfalls and how applicants can avoid them.

Learn more

Blog post

Vous envisagez les États-Unis pour la rentrée prochaine ? C'est le moment de préparer votre visa E-2!

Entrepreneurs français : anticipez votre projet d’installation aux États-Unis avec un visa E-2. Découvrez les étapes clés pour préparer votre investissement, votre demande de visa et le déménagement familial avant la prochaine rentrée scolaire.

Learn more

Media mentions

Biometric Update: Fragomen-SICPA JV Adds IDEMIA Biometrics to Assemble End-to-End Identity Platform

Fragomen and SICPA expand their digital identity platform through a strategic collaboration with IDEMIA Public Security.

Learn more

Blog post

Document Legalization Is Becoming a Global Mobility Compliance Issue: Five Trends Employers Should Watch

In this blog, UAE Consular and Document Services Manager Minu Joseph examines five global legalization trends through a Middle East lens—and outlines how employers can prepare earlier to keep assignments on track.

Learn more

Blog post

Doing Business in Qatar: Growth and Workforce Mobility

In this blog, Corporate Services Manager Julia Ignatenko explores why businesses should coordinate company formation, regulatory compliance, leadership presence and workforce mobility from the outset.

Learn more

Awards

Fragomen Wins Immigration Provider of the Year: 2026 FEM APAC EMMAs

Fragomen won Immigration Provider of the Year at the 2026 FEM APAC EMMAs, and our Worldwide Immigration Trends Report 2026 received a Highly Commended recognition in the Thought Leadership category.

Learn more

Media mentions

Forbes: DHS Adds Immigration Rule Stopping H-1B Spouses From Working To Agenda

Partner Kevin Miner discusses DHS’ proposed rule to end employment authorization for certain H-4 spouses of H-1B professionals.

Learn more

Media mentions

Newsweek: Green Card Update: Major Change Announced for Sponsors

Counsel Brian Hunt discussed USCIS’ new ability to obtain credit information from green card sponsors and the potential implications for future regulatory actions.

Learn more

Podcast

Insight & Impact - Episode 2: Why Data Matters

Canada Managing Partner Cosmina Morariu and Senior Director Leah L. Rogal discuss how immigration, demographic, labor market and economic data can help organizations interpret policy developments, anticipate talent needs and make more strategic workforce and mobility decisions.

Learn more

Fragomen news

Fragomen Opens Denver Office, Strengthening Support for Colorado Employers

Fragomen opens a Denver office to expand immigration support for Colorado employers and growing businesses.

Learn more

Video

Ordinary Naturalisation in Switzerland | #MobilityMinute

Manager Mihaela Dumitru discusses key requirements for ordinary naturalisation in Switzerland, including residence, integration, language skills and local knowledge assessments.

Learn more
Generic Insights

Blog post

Pre-Settled Status and Absences From the UK: When Could Status Be at Risk?

In this blog, Immigration Consultant Mirela Sartori explains when absences could place status at risk, how the Home Office assesses residence and what to do if you receive a “minded to curtail” notice, which generally requires a response within 28 days.

Learn more

Article

Foreign Birth Registration: Mistakes That Can Delay Irish Citizenship Applications

From documentation gaps and certification errors to missed deadlines, Senior Immigration Consultant Patricia Rezmives highlights 8 common FBR pitfalls and how applicants can avoid them.

Learn more

Blog post

Vous envisagez les États-Unis pour la rentrée prochaine ? C'est le moment de préparer votre visa E-2!

Entrepreneurs français : anticipez votre projet d’installation aux États-Unis avec un visa E-2. Découvrez les étapes clés pour préparer votre investissement, votre demande de visa et le déménagement familial avant la prochaine rentrée scolaire.

Learn more

Media mentions

Biometric Update: Fragomen-SICPA JV Adds IDEMIA Biometrics to Assemble End-to-End Identity Platform

Fragomen and SICPA expand their digital identity platform through a strategic collaboration with IDEMIA Public Security.

Learn more

Blog post

Document Legalization Is Becoming a Global Mobility Compliance Issue: Five Trends Employers Should Watch

In this blog, UAE Consular and Document Services Manager Minu Joseph examines five global legalization trends through a Middle East lens—and outlines how employers can prepare earlier to keep assignments on track.

Learn more

Blog post

Doing Business in Qatar: Growth and Workforce Mobility

In this blog, Corporate Services Manager Julia Ignatenko explores why businesses should coordinate company formation, regulatory compliance, leadership presence and workforce mobility from the outset.

Learn more

Awards

Fragomen Wins Immigration Provider of the Year: 2026 FEM APAC EMMAs

Fragomen won Immigration Provider of the Year at the 2026 FEM APAC EMMAs, and our Worldwide Immigration Trends Report 2026 received a Highly Commended recognition in the Thought Leadership category.

Learn more

Media mentions

Forbes: DHS Adds Immigration Rule Stopping H-1B Spouses From Working To Agenda

Partner Kevin Miner discusses DHS’ proposed rule to end employment authorization for certain H-4 spouses of H-1B professionals.

Learn more

Media mentions

Newsweek: Green Card Update: Major Change Announced for Sponsors

Counsel Brian Hunt discussed USCIS’ new ability to obtain credit information from green card sponsors and the potential implications for future regulatory actions.

Learn more
Fragomen.com home
Select Language
  • English
  • French
  • French - Canadian
  • German

Select Language

  • English
  • French
  • French - Canadian
  • German
ContactCareersMediaClient Portal
Search Fragomen.com
  • Our Services
    For EmployersFor IndividualsBy IndustryCase Studies
  • Our Tech & Innovation
  • Our People
  • Our Insights
    Worldwide Immigration Trends ReportsMagellan SeriesImmigration AlertsEventsMedia MentionsFragomen NewsBlogsPodcasts & Videos
  • Spotlights
    Travel and Mobility Considerations: Situation in the Middle EastNavigating Immigration Under the Second Trump AdministrationImmigration Matters: Your U.S. Compliance RoadmapCenter for Strategy and Applied InsightsView More
  • About Us
    About FragomenOfficesResponsible Business PracticesFirm GovernanceRecognition

Our Services

  • For Employers
  • For Individuals
  • By Industry
  • Case Studies

Our Tech & Innovation

  • Our Approach

Our People

  • Overview / Directory

Our Insights

  • Worldwide Immigration Trends Reports
  • Magellan Series
  • Immigration Alerts
  • Events
  • Media Mentions
  • Fragomen News
  • Blogs
  • Podcasts & Videos

Spotlights

  • Travel and Mobility Considerations: Situation in the Middle East
  • Navigating Immigration Under the Second Trump Administration
  • Immigration Matters: Your U.S. Compliance Roadmap
  • Center for Strategy and Applied Insights
  • View More

About Us

  • About Fragomen
  • Offices
  • Responsible Business Practices
  • Firm Governance
  • Recognition
Select Language
  • English
  • French
  • French - Canadian
  • German

Select Language

  • English
  • French
  • French - Canadian
  • German
ContactCareersMediaClient Portal
Important Updates
Important Updates
September 4, 2026 | DenmarkDenmark: New Immigration Pathway for Certified Employers Hiring Foreign Nationals from Select Countries
September 8, 2026 | United StatesFragomen Opens Denver Office, Strengthening Support for Colorado Employers
September 8, 2026 | RussiaRussia: New Monitoring Application Requirements for Certain Nationals
September 8, 2026 | 🌐Worldwide/Ukraine: Temporary Protection Status - Country-Specific Updates
September 4, 2026 | 🌐Biometric Update: Fragomen-SICPA JV Adds IDEMIA Biometrics to Assemble End-to-End Identity Platform
September 4, 2026 | DenmarkDenmark: New Immigration Pathway for Certified Employers Hiring Foreign Nationals from Select Countries
September 8, 2026 | United StatesFragomen Opens Denver Office, Strengthening Support for Colorado Employers
September 8, 2026 | RussiaRussia: New Monitoring Application Requirements for Certain Nationals
September 8, 2026 | 🌐Worldwide/Ukraine: Temporary Protection Status - Country-Specific Updates
September 4, 2026 | 🌐Biometric Update: Fragomen-SICPA JV Adds IDEMIA Biometrics to Assemble End-to-End Identity Platform
September 4, 2026 | DenmarkDenmark: New Immigration Pathway for Certified Employers Hiring Foreign Nationals from Select Countries
Subscribe

Stay in touch

Subscribe to receive our latest immigration alerts

Subscribe

Our firm

  • About
  • Careers
  • Firm Governance
  • Media Inquiries
  • Recognition

Information

  • Attorney Advertising
  • Legal Notices
  • Privacy Policies
  • AI Transparency Statement
  • UK Regulatory Requirements

Our firm

  • About
  • Careers
  • Firm Governance
  • Media Inquiries
  • Recognition

Information

  • Attorney Advertising
  • Legal Notices
  • Privacy Policies
  • AI Transparency Statement
  • UK Regulatory Requirements

Have a question?

Contact Us
  • LinkedIn
  • Youtube
  • Instagram
  • Facebook
  • TikTok
  • Twitter

© 2026 Fragomen, Del Rey, Bernsen & Loewy, LLP, Fragomen Global LLP and affiliates. All Rights Reserved.

Please note that the content made available on this site is not intended for visitors / customers located in the province of Quebec, and the information provided is not applicable to the Quebec market. To access relevant information that applies to the Quebec market, please click here.