Separate customer e-mail address for sending invoices (billing address)
Deutsch:
Die Erfahrung zeigt, dass die meisten Geschäftskunden eine eigene E-Mail-Adresse für den Rechnungsempfang haben, um ihre Buchhaltung zu organisieren und Rechnungen zentral zu sammeln. Aus diesem Grund sollte Shopware 6 es den Kunden ermöglichen, nicht nur eine separate Rechnungsadresse, sondern auch eine separate E-Mail-Adresse für den Rechnungsempfang anzugeben. Diese sollte dann auch zum Export (via API etc.) in das ev. angebundene ERP zur Verfügung stehen.
Englisch:
Experience shows that most business customers have a separate email address for receiving invoices in order to organise their accounting and collect invoices centrally. For this reason, Shopware 6 should allow customers to specify not only a separate billing address, but also a separate email address for receiving invoices. This should then also be available for export (via API etc.) to any connected ERP.

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Jos Goes commented
We fully agree with this. Among our B2B customers – both small and large – it's very common to have a separate accounting department responsible for processing incoming invoices. Having a dedicated email address for receiving invoices is essential for efficient bookkeeping.
In our view, this should be a standard option in any B2B ERP setup. It would be a valuable improvement if Shopware 6 supported this functionality as standard. We hope this feature request will be given appropriate priority.