π bund.de
Bundesportal | Disclose unaccompanied cash and/or other funds when requested to do so in mail and freight transactions
If you move unaccompanied cash and/or other funds, for example in postal and freight traffic, into, out of or through the European Union, you must submit a disclosure declaration when requested to do so by the customs authorities.
β https://verwaltung.bund.de/leistungsverzeichnis/en/leistung/99122053001000