Peppol BIS Billing 3.0 · rule
IS-R-009
What does IS-R-009 mean? If seller is icelandic and invoice contains supporting description EINDAGI invoice must have due date — Ef seljandi er íslenskur þá skal reikningur sem inniheldur eindaga (BT-122, DocumentDescription = EINDAGI) einnig hafa gjalddaga (BT-9).
Why did my invoice fail IS-R-009?
If the seller is Icelandic and the invoice contains an EINDAGI supporting reference (BT-122, DocumentDescription = EINDAGI), the invoice must also have a due date (BT-9). The Icelandic final-due-date concept only makes sense relative to a regular due date, so this Peppol BIS 3.0 country rule requires cbc:DueDate whenever EINDAGI is used.
Official rule text
If seller is icelandic and invoice contains supporting description EINDAGI invoice must have due date — Ef seljandi er íslenskur þá skal reikningur sem inniheldur eindaga (BT-122, DocumentDescription = EINDAGI) einnig hafa gjalddaga (BT-9).
Common causes
- cbc:DueDate omitted while an EINDAGI reference is present
- Due date supplied only in payment terms text instead of BT-9
How do I fix it?
<cbc:DueDate>2026-08-01</cbc:DueDate>
Related rules
IS-R-001 · IS-R-002 · IS-R-003 · IS-R-004 · IS-R-005 · IS-R-006 · IS-R-007 · IS-R-008
Paste it into the live demo, or call POST /v1/validate. See the quickstart.