Reference
Markdown exportBT-26 Preceding invoice issue date
Issue date of the preceding invoice referenced in BT-25.
Quick answer
Issue date of the preceding invoice referenced in BT-25.
Invoice basics
Core document identifiers, dates, process identifiers, and high-level invoice context.
In plain language
Issue date of the preceding invoice referenced in BT-25.
Issue date of the preceding invoice referenced in BT-25.
The date helps recipients identify the exact earlier invoice when invoice numbers alone are not enough.
What you usually enter here
ISO 8601 date format (YYYY-MM-DD)
Typical valid values include: 2026-03-15
Optional according to EN 16931-1.
What goes wrong often
Avoid values like: 15.03.2026
Examples in context
The date helps recipients identify the exact earlier invoice when invoice numbers alone are not enough.
Optional according to EN 16931-1.
Valid Examples
Use these points as the practical checks for this section.
- 2026-03-15
Invalid Examples
Use these points as the practical checks for this section.
- 15.03.2026
XML mapping and field facts
Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.
Field ID:
BT-26
Data Type:
date
Cardinality:
0..1
Requirement:
Optional
Since Version:
Optional
XML Implementation
/Invoice/cac:BillingReference/cac:InvoiceDocumentReference/cbc:IssueDate/CrossIndustryInvoice/SupplyChainTradeTransaction/ApplicableHeaderTradeSettlement/ram:InvoiceReferencedDocument/ram:FormattedIssueDateTimeWhy the standard cares about this field
Business Context
The date helps recipients identify the exact earlier invoice when invoice numbers alone are not enough.
Legal Requirement
Optional according to EN 16931-1.