What it means
For every CII reference element whose name ends in ReferencedDocument, ram:FormattedIssueDateTime must be absent unless the reference is ram:InvoiceReferencedDocument. In a preceding invoice reference, this field represents the preceding invoice date (BT-26). The test concerns this specific element, not every possible date field.
Why it matters
This CII mapping provides ram:FormattedIssueDateTime on invoice references. A contract, order or supporting document date must not be presented as a preceding invoice date.
How to fix it
Remove ram:FormattedIssueDateTime from the affected non-invoice reference. If the date belongs to a preceding invoice, record it as BT-26 alongside that invoice's reference (BT-25). If you need to retain an order or contract date as explanatory text, use the invoice note (BT-22). Export the corrected file and recheck it.
Once the file is corrected, check it again for free: Validate an invoice against EN 16931
Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice
The rule as published
FormattedIssueDateTime should not be present Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (CII) | 1.3.17 |
| XRechnung 3.0 (CII) | 3.0.2 |
| NLCIUS (CII) | 1.0.3.13 |
| France CTC (CII) | 1.4.0-04 |
Check your file
Drop your e-invoice to see whether CII-DT-027 still fails, and which other rules do.
Related rules
- CII-DT-028 Remove effective periods from document references
- CII-DT-029 Remove IssuerTradeParty from document references
- CII-DT-030 Use the supported attachment element
- CII-DT-031 Only VAT total amounts may use currencyID
- CII-DT-032 Remove extra currency list version attributes
- CII-DT-033 Check unit codes on billed quantities