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BR-DE-7: Seller contact email address (BT-43) is missing

Official message

[BR-DE-7] Das Element "Seller contact email address" (BT-43) muss übermittelt werden.

XRechnung (CII) · Error · Message language: German · Version: xrechnung-3.0.2-validator-configuration-2026-08-31

[BR-DE-7] Das Element "Seller contact email address" (BT-43) muss übermittelt werden.

XRechnung (UBL) · Error · Message language: German · Version: xrechnung-3.0.2-validator-configuration-2026-08-31
Severity
Error The invoice is invalid and may be rejected by the recipient.
Applies to
XRechnung (CII), XRechnung (UBL)
Affected fields
BT-43

What does this mean?

The seller contact details must contain an email address (Seller contact email address, BT-43). The element is missing or contains only spaces.

Typical causes

The seller's email field was left empty.
The email address was only given as electronic address (BT-34); that is a different element.

How to fix the error

Enter an email address of the seller for questions about the invoice.
CII: ram:SellerTradeParty/ram:DefinedTradeContact/ram:EmailURIUniversalCommunication/ram:URIID, UBL: cac:AccountingSupplierParty/cac:Party/cac:Contact/cbc:ElectronicMail.
Generate and validate the invoice again.

In E-Rechnungsfreund

In the invoice form, section "Verkäufer (BG-4)" (seller), fill in the field "E-Mail (BT-43/58)".

Example

Wrong

<ram:DefinedTradeContact>
  <ram:PersonName>Max Mustermann</ram:PersonName>
  <ram:TelephoneUniversalCommunication>
    <ram:CompleteNumber>+49 30 1234567</ram:CompleteNumber>
  </ram:TelephoneUniversalCommunication>
</ram:DefinedTradeContact>

Correct

<ram:DefinedTradeContact>
  <ram:PersonName>Max Mustermann</ram:PersonName>
  <ram:TelephoneUniversalCommunication>
    <ram:CompleteNumber>+49 30 1234567</ram:CompleteNumber>
  </ram:TelephoneUniversalCommunication>
  <ram:EmailURIUniversalCommunication>
    <ram:URIID>rechnung@muster.de</ram:URIID>
  </ram:EmailURIUniversalCommunication>
</ram:DefinedTradeContact>
For developers: test expression per syntax

XRechnung (CII) (CII)

Context: /rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:DefinedTradeContact

ram:EmailURIUniversalCommunication/ram:URIID[boolean(normalize-space(.))]

XRechnung (UBL) (UBL)

Context: /ubl:Invoice/cac:AccountingSupplierParty/cac:Party/cac:Contact | /cn:CreditNote/cac:AccountingSupplierParty/cac:Party/cac:Contact

cbc:ElectronicMail[boolean(normalize-space(.))]

Related validation rules

  • BR-DE-1: Payment instructions (BG-16) are missing
  • BR-DE-10: Deliver to city (BT-77) is missing
  • BR-DE-11: Deliver to post code (BT-78) is missing
  • BR-DE-14: VAT category rate (BT-119) is missing in the VAT breakdown
  • BR-DE-15: Buyer reference (BT-10) is missing
  • BR-DE-16: Seller VAT ID, tax number or tax representative is missing

Frequently asked questions

Is the seller electronic address (BT-34) enough?

No. BT-34 is the electronic address used for delivery. BR-DE-7 requires the email address in the contact details (BT-43); both are provided separately.

Last updated:
Explanation of the validation rule, not legal or tax advice.