Recent judicial developments in Germany have clarified the legal weight of the Arbeitsunfähigkeitsbescheinigung (AU), the standard medical certificate for sick leave. While the AU remains a strong instrument for employees, recent rulings from the Federal Labour Court (Bundesarbeitsgericht or BAG) have reinforced that its evidentiary value is not absolute. When an employee’s behavior creates significant doubt regarding their incapacity, employers may successfully challenge the certificate, potentially impacting the validity of a termination based on illness.
As the Editor of the Health section at World Today Journal, I have monitored how these legal standards intersect with evolving medical documentation practices. In a landmark decision (Ref: 5 AZR 149/21), the Federal Labour Court confirmed that if an employee hands in their resignation on the same day they receive a medical certificate for the exact duration of their notice period, the evidentiary value of that certificate can be legally questioned. This ruling does not invalidate the AU itself, but it shifts the burden of proof, requiring the employee to provide more detailed medical evidence to justify their absence to a court.
The Evidentiary Weight of the AU
The Arbeitsunfähigkeitsbescheinigung serves as a formal declaration by a physician that an employee is unable to work due to health reasons. According to the German EntgFG (Entgeltfortzahlungsgesetz), this document typically provides high legal certainty for both the employer and the employee. However, this certainty is conditional. As noted by legal analysts, the “evidentiary value” (Beweiswert) is a rebuttable presumption. If an employer presents concrete facts that strongly suggest the employee is not actually ill, the court may disregard the AU as conclusive proof.
This is particularly relevant in cases where an employee is terminated for health-related reasons. If an employer suspects that an illness is being used to bypass notice periods or avoid work requirements, they may challenge the certificate in court. The court will then evaluate whether the employee’s medical condition truly prevented them from fulfilling their contractual duties. For more information on employee rights and obligations, the Federal Ministry of Labour and Social Affairs (BMAS) provides comprehensive guidelines on statutory labor regulations.
Modernizing Medical Documentation
The landscape of health documentation has also been influenced by the transition to the electronic medical certificate, known as the elektronische Arbeitsunfähigkeitsbescheinigung (eAU). Since January 1, 2023, employees are no longer required to submit a paper copy of their sick note to their employer. Instead, the employer retrieves the data directly from the health insurance provider. This digital transformation aims to streamline administrative processes, but it does not alter the fundamental legal requirements for proving incapacity.
Despite the digital nature of the eAU, the legal standards regarding the “evidentiary value” remain tied to the physician’s assessment. If an employer has reason to doubt the authenticity of the information, the fact that the certificate is transmitted digitally does not grant it extra immunity from judicial review. Employers remain entitled to request a medical examination by the Medical Review Board of the Health Insurance Funds (MDK) in specific, justified cases, as outlined in the Social Code (SGB V).
Managing Risks in the Workplace
For employees, maintaining a transparent relationship with their employer regarding health-related absences is critical. While the law protects those who are genuinely ill, the tactical use of sick leave during sensitive periods, such as after receiving a termination notice, carries substantial risk. Courts are increasingly scrutinizing the timing of medical certificates. If a certificate exactly mirrors the length of a notice period, it may be viewed with heightened skepticism by labor courts.
Employers, conversely, must exercise caution before acting on suspicions. Alleging abuse of sick leave without sufficient evidence can lead to legal complications, including potential claims for damages or wrongful termination. Legal experts consistently advise that employers document specific instances that lead them to doubt the AU—such as public social media activity or documented statements—before moving to challenge the certificate in a legal proceeding. For guidance on labor law disputes, the German judiciary provides information on the Federal Labour Court’s latest rulings.
Future Judicial Developments
The tension between medical privacy and the employer’s need for workforce stability continues to be a subject of intense debate. Legal experts anticipate that further court rulings will continue to refine the criteria for when an AU can be “shaken” (erschüttert). As digital health records become more integrated into the workplace, the ability for both parties to verify the legitimacy of health-related absences will likely undergo further scrutiny.
The next significant update regarding labor law and health-related termination will likely emerge from future sessions at the Federal Labour Court, where individual cases continue to test the boundaries of the Entgeltfortzahlungsgesetz. Readers are encouraged to keep track of official legal databases for updates on these precedents. What has your experience been with the digital sick note system in your workplace? Share your thoughts and questions in the comments section below.