Mixed Signals and Missed Delivery: German Courts Tighten the Rules on Sick-Leave Reintegration

Recent rulings require employers to clarify contradictory BEM signals, prove delivery, and re-invite after new absences. New laws mandate sick notes from day one and cut sick pay.

When a municipal street cleaner in Cologne rejected an invitation to participate in a company’s return-to-work program but simultaneously asked the works council to get involved and submitted medical records, his employer assumed the matter was closed. The company issued a dismissal anyway. That decision has now cost it – the Cologne Regional Labour Court (LAG Köln) declared the termination void.

In its ruling of 23 October 2025 (case reference 6 SLa 184/25), the court found that the employer had a duty to clarify the employee’s contradictory signals. The worker may have confused the mandatory reintegration procedure known as Betriebliches Eingliederungsmanagement (BEM) with a phased return to work, the judges reasoned. The consequence for employers is clear: if a worker rejects a BEM offer but still shows interest, the company must follow up and resolve any misunderstandings before a dismissal can be lawful.

A separate decision from Germany’s highest labour court, the Bundesarbeitsgericht (BAG), raises the bar on how such invitations must be delivered. In a ruling on 7 May 2026 (Az. 2 AZR 184/25), the BAG held that a digital delivery receipt from Deutsche Post does not constitute proof that a BEM letter actually reached the employee. The case involved a worker hired in 2015 who denied receiving the invitation; the employer could not provide alternative evidence. The dismissal was invalidated.

The practical advice from employment lawyers is increasingly blunt: important documents such as BEM invitations, formal warnings and termination notices should be handed over in person, sent by courier, or delivered by a bailiff. Only then can receipt be proved in a legally watertight way.

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The BAG also clarified in May 2026 that a single rejected BEM offer does not let an employer off the hook for good. If an employee accumulates new sick-leave absences exceeding six weeks within a twelve-month period, the employer must issue a fresh invitation. Citing the earlier offer is not sufficient, and ignoring this duty can make a future dismissal disproportionate and therefore invalid.

Alongside the court rulings, the political arena is moving in the same direction at pace. At the beginning of July 2026, the federal government approved a rule that would require a medical certificate from the first day of illness – though companies may opt out of the requirement. The overall trend, however, is toward stricter monitoring of absence. Meanwhile, the GKV-Beitragssatzstabilisierungsgesetz, passed on 10 July 2026, cuts the sick-pay rate for employees who lose their job while on sick leave. From 1 January 2027, the benefit will drop from 70 to 60 percent of gross earnings (67 percent for workers with children) – the same level as standard unemployment benefit.

Employers who go the other direction and hire private detectives to monitor sick-listed staff face serious financial risk. In one recent case, a court awarded a worker 5,000 euros in damages after her employer had her shadowed during a period of certified incapacity. However, the LAG Köln (Az. 7 SLa 54/25) also made clear that the evidentiary value of a sick note can be weakened if it was issued in suspicious proximity to workplace conflicts or the return of company equipment. In such situations, the employee must provide detailed proof of their symptoms and how those symptoms affected their ability to work.