BR-03
The invoice has no issue date (BT-2).
ErrorEN 16931UBLCII
Why it happens
Missing date, or a date in the wrong format. EN 16931 requires an ISO date, YYYY-MM-DD — not DD/MM/YYYY and not a timestamp.
How to fix it
Set BT-2 — cbc:IssueDate in UBL, ram:IssueDateTime with format code 102 in CII. Reformat any locale-specific date from your accounting export before conversion.
The official rule
EN 16931, EnglishAn Invoice shall have an Invoice issue date (BT-2).
Technical detail — where the rule is evaluated and the exact test
| Syntax | Context and assertion |
|---|---|
| UBL | /ubl:Invoice | /cn:CreditNote |
normalize-space(cbc:IssueDate) != '' | |
| CII | /rsm:CrossIndustryInvoice |
normalize-space(rsm:ExchangedDocument/ram:IssueDateTime/udt:DateTimeString[@format='102']) != '' |
Check your own invoice
Paste or drop your UBL or CII file into the free validator. It runs the official EN 16931 ruleset plus the German XRechnung layer and lists every rule that fires, BR-03 included — no signup, no limit.
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