A temporary residence permit (VNJ) or Fiktionsbescheinigung (fictional certificate) is typically tied to a valid passport. If the passport expires, the VNJ may become invalid, and a Fiktionsbescheinigung will also expire with the old passport. Obtaining a Passersatz (passport substitute) is difficult and usually requires being stateless or having compelling reasons preventing passport renewal from the home country. It might be faster to travel to Russia for renewal, but this carries risks if the current German residence permit is close to expiry. The German Foreigners' Office (ABH) usually requires a valid passport to issue a new residence card. Legal consultation can be expensive (e.g., 440 EUR/hour in 2024 for an immigration lawyer, or 230 EUR/hour for other legal issues).
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