`BR-DE-2`

XRechnung (KoSIT) · validation rule

XRechnung (KoSIT)Error

XRechnung requires a seller contact (BG-6): contact name, phone and e-mail. The sender must add cac:AccountingSupplierParty/cac:Party/cac:Contact / ram:SellerTradeParty/ram:DefinedTradeContact.

Field: seller.contact (BG-6)
Rule set: XRechnung (KoSIT)
Rule-set version: XRechnung 3.0.2 Schematron 2.6.0 · in force since 2026-10-17 · Rule-set changelog
Who has to fix it: The sender

This is a property of the file you received, so it cannot be corrected on your side without changing the document — ask the supplier to reissue it.

Worked example · UBL

XRechnung requires the seller contact group (BG-6) with all three of name, telephone and e-mail (BR-DE-5/6/7), even for a company-level mailbox.

Fails this rule

<!-- cac:AccountingSupplierParty/cac:Party has no cac:Contact -->

Passes

<cac:Contact>
  <cbc:Name>Rechnungsstelle</cbc:Name>
  <cbc:Telephone>+49 30 1234567</cbc:Telephone>
  <cbc:ElectronicMail>[email protected]</cbc:ElectronicMail>
</cac:Contact>

Worked example · CII

Fails this rule

<!-- ram:SellerTradeParty has no ram:DefinedTradeContact -->

Passes

<ram:DefinedTradeContact>
  <ram:PersonName>Rechnungsstelle</ram:PersonName>
  <ram:TelephoneUniversalCommunication>
    <ram:CompleteNumber>+49 30 1234567</ram:CompleteNumber>
  </ram:TelephoneUniversalCommunication>
  <ram:EmailURIUniversalCommunication>
    <ram:URIID>[email protected]</ram:URIID>
  </ram:EmailURIUniversalCommunication>
</ram:DefinedTradeContact>

Check your own invoice

Drop the file that failed. We parse it, run the official rule sets against it and list every finding with a fix — 20 invoices per day, no key, nothing stored.

Open the live demo

Same explanation over the API: GET /v1/rules/BR-DE-2?lang=en