Employees who are unable to work due to illness must notify their employer immediately to avoid disciplinary action or loss of pay. Under current labor regulations, “immediately” generally means before the start of the scheduled work shift, ensuring the company can manage operational gaps. Failure to provide timely notification or a valid medical certificate can lead to formal warnings or termination of employment.
The process of reporting an absence is governed by a combination of statutory law and individual employment contracts. While the law provides a baseline for sick pay and notification, specific company policies often dictate the preferred method of communication—whether via email, phone call, or a dedicated HR portal. In Germany, where these rules are strictly enforced, the transition to digital health records has fundamentally changed how medical certificates are transmitted to employers.
The legal standard for notification is “unverzüglich,” a term defined in the German Civil Code (Bürgerliches Gesetzbuch – BGB) as “without culpable delay.” This means an employee cannot wait until the middle of the workday to announce they are sick; the notification must happen as soon as the illness is recognized and the employee is physically capable of communicating.
How to Notify Your Employer Correctly
Timely notification is the most critical step in protecting an employee’s legal standing. According to guidelines from the Federal Ministry of Labour and Social Affairs, the primary goal is to allow the employer to reorganize work. The notification must include the fact that the employee is unable to work and, if known, the expected duration of the absence.
While many modern workplaces accept text messages or emails, employees should verify their specific contract. If a contract explicitly requires a phone call, a text message may be considered insufficient, potentially leading to an “Abmahnung” (formal warning). To ensure a verifiable trail, employees are often advised to use written communication or follow up a phone call with a brief email.
Special considerations apply to those working remotely. Even if an employee feels “well enough” to check emails but “too sick” to perform full duties, they must still formally report their incapacity to work if they cannot meet their contractual obligations. Attempting to “work through” an illness without notification can lead to confusion regarding the employee’s actual status and may complicate future insurance claims.
When Is a Medical Certificate Required?
The requirement for a medical certificate, known as an Arbeitsunfähigkeitsbescheinigung (AU), depends on the employment contract. By statutory law, an employer may request a doctor’s note starting on the third calendar day of illness. However, most employment contracts include a clause allowing the employer to demand a certificate from the very first day of absence.
A medical certificate does not list the specific diagnosis; it only confirms that the employee is unfit for work and specifies the expected end date of the illness. Under data protection laws, including the General Data Protection Regulation (GDPR), employers are not entitled to know the medical reason for the absence.
If an employee fails to provide a required certificate by the deadline specified in their contract, the employer is legally permitted to withhold sick pay (Entgeltfortzahlung) for those days. This does not necessarily mean the employee is fired, but it creates a financial gap that the employee must resolve with their health insurance provider.
Understanding the Electronic Sick Note (eAU)
As of January 1, 2023, Germany transitioned to the electronic certificate for health insurance (eAU). This system removes the need for employees to manually hand over a paper slip to their employer. Instead, the doctor transmits the digital certificate directly to the health insurance provider.

According to the Federal Ministry of Health, the employer then retrieves the data electronically from the health insurance fund. This shift is designed to reduce bureaucracy and prevent the loss of physical documents. However, the employee’s duty to notify the employer of their absence remains unchanged; the eAU replaces the delivery of the note, not the notification of the illness.
Employers are required to retrieve the eAU data by the end of the month following the illness. If an employee is unable to access a digital system or if the health insurance provider experiences technical failures, the traditional paper certificate remains a valid backup. Employees should always confirm with their doctor that the digital transmission was successful to avoid payment disputes.
Legal Consequences of Improper Reporting
Failure to follow sick leave protocols can have severe professional consequences. The most common progression of disciplinary action begins with a formal warning. A warning is typically issued if an employee fails to notify the employer on time or fails to provide a medical certificate despite a contractual requirement.
Repeated failures to report sick leave properly can be grounds for termination. In extreme cases, if an employee disappears for several days without any communication, it may be classified as “unexcused absence,” which can justify an extraordinary termination (fristlose Kündigung) for cause, as it is viewed as a breach of the fundamental duty of loyalty to the employer.
Conversely, employers cannot legally “punish” an employee for being sick. While they can penalize the failure to report the illness, they cannot terminate an employee simply because they are frequently ill, provided the absences are backed by valid medical certificates. Protection against dismissal during illness is a cornerstone of labor law in many European jurisdictions.
Comparing Notification Methods and Requirements
| Requirement | Statutory Baseline | Common Contractual Terms |
|---|---|---|
| Notification Timing | Immediately (unverzüglich) | Before work shift begins |
| Certificate Deadline | 3rd calendar day | 1st calendar day |
| Delivery Method | Any verifiable method | Specific (e.g., Phone or HR Portal) |
| Diagnosis Disclosure | Not required/Prohibited | Not required/Prohibited |
What to Do If Your Employer Rejects Your Sick Leave
Disputes occasionally arise when an employer doubts the validity of a sick leave claim. In such cases, the employer has the right to request a medical examination by a company-appointed doctor (Vertrauensarzt). This is a standard procedure used to verify if the employee is truly unfit for work, though the company doctor cannot disclose the diagnosis to the employer—only whether the employee is fit or unfit for duty.
If an employer refuses to accept a valid eAU or paper certificate, the employee should immediately document the submission. This can be done by sending the certificate via registered mail or saving a timestamped copy of the email. If sick pay is withheld despite a valid certificate, the employee should contact their works council (Betriebsrat) or a legal representative specializing in labor law.
Employees should also be aware of the “sick leave fraud” risk. Faking an illness or using sick leave for vacations is considered a serious breach of contract and is almost always grounds for immediate termination. Employers may investigate suspicious patterns, such as sickness consistently falling on Mondays or Fridays, though they still cannot demand the medical diagnosis.
The next critical checkpoint for employees regarding these rules is the annual review of employment contracts and the updated guidelines released by health insurance funds regarding the eAU system. As digital integration increases, the window for “administrative errors” in reporting is narrowing.
Do you have questions about your specific employment contract or the eAU process? Share your experiences or questions in the comments below.