π bund.de
Bundesportal | Apply for conversion of an outdated private pilot license or an outdated supplement for aircraft and helicopters in accordance with the current legal situation
If you have an outdated pilot's license that was issued before 2011, you can have it converted at your local aviation authority if necessary.
β https://verwaltung.bund.de/leistungsverzeichnis/en/leistung/99080140001000