Short Answer

Your employer can legally demand a certified medical sick note on the very first day of your absence.

While statutory law allows a grace period until the fourth day, individual contract clauses frequently override this flexibility.

What Most Expats Don't Realize

You woke up with a severe flu on a Monday morning and stayed in bed, planning to visit the doctor on Wednesday if symptoms persisted. When you returned to work, HR issued a formal written reprimand (Abmahnung) because your contract contained a strict first-day notification rule you ignored. The formal warning remained on your permanent corporate record, blocking your upcoming annual promotion and costing you a €4,000 expected salary increase.

What To Do

  • Check your employment contract text for the specific section labeled "Anzeige- und Nachweispflicht" to find the sick note deadline.
  • Call your general practitioner's office at 8:00 AM on the first morning of your illness to request an official evaluation.
  • "Ich benötige eine Arbeitsunfähigkeitsbescheinigung ab heute." (I need a certificate of incapacity for work starting today.) — state this clearly to the medical receptionist to ensure your absence is legally covered.