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Certificat de Déclaration Préalable

The Certificat de Déclaration Préalable is a key requirement for companies posting workers in Luxembourg.

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A Crucial Step in Posting Workers to Luxembourg

For companies posting workers to Luxembourg, the necessity to ensure a meticulous adherence to regulations is imperative to ensure fair treatment of workers across borders.

Luxembourg, a central hub for economic activities in Europe, mandates a comprehensive process for companies intending to post workers temporarily.

At the heart of this process lies the Certificat de Déclaration Préalable, a document distinct from the badge social or other notification procedures, yet equally pivotal in safeguarding the rights of posted workers. 

The Certificat de Déclaration Préalable

The Certificat de Déclaration Préalable, or Certificate of Prior Declaration, plays a key role in the framework governing the posting of workers in Luxembourg.

Unlike the badge social or notification procedures, this certificate is not to be confused with other aspects of the posting process. It serves as an anticipatory measure, obliging companies to declare their intent to send employees to Luxembourg for temporary assignments.

The primary objective is to ensure that posted workers receive equitable treatment, enjoying the same labor and social security rights as their local counterparts. 

Components of the Certificate

To secure the Certificat de Déclaration Préalable, companies must provide detailed information about their main activities in the home country and other translated documents, in case of request by the issuing authorities.

Alignment with EU Regulations

The requirement of this certificate aligns with broader European Union regulations, designed to create a level playing field for workers across Member States. This preemptive measure aids in preventing social dumping, ensuring that posted workers receive fair remuneration and working conditions.

The Certificat de Déclaration Préalable facilitates transparency, enabling Luxembourgish authorities to monitor and enforce compliance with labor laws and relevant regulations. 

The applicable legal framework in the European Union, which national requirements must comply with, also includes a series of Directives on the posting of workers.

Placement within the notification procedure

The Certificat de Déclaration Préalable is a key element within the broader notification procedure for posting workers. Companies planning to post workers to Luxembourg must initiate this process well in advance of the intended start date.

This notification allows Luxembourgish authorities to scrutinize the details provided by the company, verifying that the posting aligns with legal requirements. 

Compliance with the Certificat brings several advantages for companies. It establishes a clear framework for posting workers, fostering transparency and legal certainty. Furthermore, adherence to these regulations enhances the reputation of companies as responsible employers, committed to upholding labor standards. 


In the dynamic realm of global employment, the Certificate of Prior Declaration stands as a cornerstone in safeguarding the rights and well-being of workers posted to Luxembourg.

Far from being a mere bureaucratic step, this certificate reflects Luxembourg’s commitment to fostering fair and ethical employment practices within its borders.

As companies continue to expand their operations internationally, understanding and successfully navigating the Certificat de Déclaration Préalable is essential for creating a harmonious and compliant working environment. 

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Regulatory Framework

Occasional and temporary provision and notification of services in Luxembourg


Learn more about Posting of Workers to Europe

Have a look at our in-depth guides about Posting of Workers to EU Countries. If you don’t know where to start, you can have a first look at our introduction on Posting of Workers to Europe.

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