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BR-TMP-2: BT-124 "External document location" must contain an absolute URL with a valid scheme

XRechnung rule · Error · UBL / CII

StandardXRechnung 3.0.2 (KoSIT, German CIUS of EN 16931)SeverityError: the invoice is rejectedSyntaxUBL, CIIBusiness terms
  • BT-124 External document location
Applies toXRechnung in UBL or CII syntax, including ZUGFeRD / Factur-X PDFs with the XRECHNUNG profile. Invoices to German public authorities (federal, state and municipal) must pass it.

Official rule text

[BR-TMP-2] BT-124 "External document location" must contain an absolute URL with a valid scheme.

Official text (German): BT-124 "External document location" muss eine absolute URL mit gültigem Schema enthalten.

Why this error occurs

The value is present but does not match the required pattern: wrong date format, an IBAN with a wrong check digit, an e-mail address without a valid structure, a URL without scheme, or a text with forbidden characters.

How to fix it

Correct the value so it matches the format named in the rule: dates as YYYY-MM-DD in UBL and YYYYMMDD with format="102" in CII, IBANs without spaces and with a valid checksum, e-mail addresses with exactly one @, URLs starting with http:// or https://.

What the validator checks

Checked element (context):

UBL

/ubl:Invoice/cac:AdditionalDocumentReference/cac:Attachment/cac:ExternalReference | /cn:CreditNote/cac:AdditionalDocumentReference/cac:Attachment/cac:ExternalReference

Test (XPath):

matches(cbc:URI, $XR-URL-REGEX)

CII

/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:AdditionalReferencedDocument[ram:TypeCode = '916']

Test (XPath):

not(exists(ram:URIID)) or (matches(ram:URIID, $XR-URL-REGEX))

Check your invoice

Drop your XML or PDF on the validator and every failed rule is linked to its page here. Free, no account, the file is not stored.

Check your invoice →

Same check via API:

curl -F file=@invoice.xml https://einvoicechecker.com/v1/validate

Related rules

Frequently asked questions

What does BR-TMP-2 mean?

BR-TMP-2 is a xrechnung rule: BT-124 "External document location" must contain an absolute URL with a valid scheme.

Will my invoice be rejected because of BR-TMP-2?

Yes. BR-TMP-2 is flagged "fatal"; validators (KoSIT, Peppol access points, the German ZRE/OZG-RE portals) reject the invoice until it is fixed.

Which formats does BR-TMP-2 apply to?

XRechnung in UBL or CII syntax, including ZUGFeRD / Factur-X PDFs with the XRECHNUNG profile. Invoices to German public authorities (federal, state and municipal) must pass it. Syntax: UBL and CII.

Source: XRechnung 3.0.2, schematron 2.6.0 (KoSIT, September 2026). Catalogue generated from the official schematron on 2026-10-14.