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IS-R-008

Validation message

If seller is icelandic and invoice contains supporting description EINDAGI then the id form must be YYYY-MM-DD — Ef seljandi er íslenskur þá skal eindagi (BT-122, DocumentDescription = EINDAGI) vera á forminu YYYY-MM-DD.

Explanation

Besides the due date, Icelandic invoices know the eindagi: the last day for payment, after which late-payment interest accrues. It is given as a document reference described as EINDAGI, with the date as its identifier. For an Icelandic seller, this must be a valid date in the format YYYY-MM-DD, e.g. 2026-03-31.

How to fix

Ask the seller for a corrected invoice with the eindagi in the format YYYY-MM-DD.

Applies to

  • PEPPOL BIS (UBL)