XRechnung error BR-DE-7: seller contact email missing
BR-DE-7 requires the seller contact email address (BT-43). It is part of the seller contact group (BG-6), which XRechnung makes mandatory (see BR-DE-2).
Last updated: 2026-06-01
Affected field
cac:Contact/cbc:ElectronicMail (UBL) / ram:DefinedTradeContact/ram:EmailURIUniversalCommunication/ram:URIID (CII)
Cause
The seller's Contact element has no email field. EN 16931 leaves it optional — XRechnung makes it mandatory.
Fix
Add an email address in cbc:ElectronicMail under cac:Contact (e.g. 'billing@example.de'). KoSIT expects exactly one '@' (BR-DE-28).
<cac:Contact> <cbc:Name>Accounts Receivable</cbc:Name> <cbc:Telephone>+49 30 1234567</cbc:Telephone> </cac:Contact>
<cac:Contact> <cbc:Name>Accounts Receivable</cbc:Name> <cbc:Telephone>+49 30 1234567</cbc:Telephone> <cbc:ElectronicMail>billing@example.de</cbc:ElectronicMail> </cac:Contact>
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Frequently asked questions
Is the email address really mandatory in XRechnung?▼
Yes. XRechnung makes the contact group (BG-6) and all three fields — contact point (BT-41), telephone (BT-42) and email (BT-43) — mandatory.
What format must the email have?▼
A valid email address with exactly one '@'. KoSIT checks this in the supplementary rule BR-DE-28.