The residence permit has expired - what does the employer do?
First ask whether the employee applied for renewal before the expiry date. If so, the old title continues by law until the decision, and the immigration office issues a Fiktionsbescheinigung (§ 81 (4), (5) AufenthG); take a copy and check what it says about employment. If no application was made in time, the person may not be employed until permission exists. Whether and how the employment relationship can end is an employment-law question - take legal advice.



