BR-TMP-6: Dates in UBL must be transmitted in the format YYYY-MM-DD

StandardXRechnung 3.0.2 (KoSIT, German CIUS of EN 16931)SeverityWarning: the invoice is accepted but should be correctedSyntaxUBLApplies 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-6] Dates in UBL must be transmitted in the format YYYY-MM-DD.

Official text (German): Datumsangaben in UBL müssen im Format JJJJ-MM-TT (YYYY-MM-DD) übermittelt werden.

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

cbc:IssueDate | cbc:DueDate | cbc:StartDate | cbc:EndDate | cbc:ActualDeliveryDate |        cbc:IssueDate | cbc:TaxPointDate | cbc:PaymentDueDate

Test (XPath):

matches(normalize-space(text()), '^\d{4}-\d{2}-\d{2}$')

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

BR-TMP-2 BT-124 "External document location" must contain an absolute URL with a valid scheme
BR-TMP-3 If BT-149 (Item price base quantity) is present in both GrossPriceProductTradePrice…
BR-TMP-4 BT-123 "Supporting document description" (ram:Name) may occur at most once within…
BR-TMP-5 BT-125 "Attached document" (ram:AttachmentBinaryObject) may occur at most once within…
BR-TMP-7 Dates in UNCEFACT/CII must carry the attribute format="102" and be transmitted in the…

Frequently asked questions

What does BR-TMP-6 mean?

BR-TMP-6 is a xrechnung rule: Dates in UBL must be transmitted in the format YYYY-MM-DD.

Will my invoice be rejected because of BR-TMP-6?

No. BR-TMP-6 is a warning: the invoice is accepted but the recipient sees the notice. Fix it anyway, warnings often become errors in later rule versions.

Which formats does BR-TMP-6 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.

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