What it means
When the seller is Icelandic and a payment means entry uses code 9 (BT-81), which the Icelandic wording calls krafa, a payment claim, that entry must have a payment account identifier (BT-84) of exactly 12 characters. The Icelandic text describes it as the bank number, the ledger 66 and the account number written as one 12-digit number. The check counts characters, so a space or hyphen inside the number makes it too long. Invoices that do not use code 9 are not affected.
Why it matters
The account number is where the buyer sends the money. If it is missing or not in the Icelandic 12-digit form, the payment cannot be made from the invoice, so the Icelandic rules treat it as an error and the invoice is rejected.
How to fix it
Check the payment details in your invoicing software. For payment means code 9, enter the 12-digit Icelandic account number as one block, with no spaces or hyphens. If you are not paid through a claim, choose the payment method that matches how you are actually paid. In the XML this is cbc:ID in cac:PayeeFinancialAccount of the cac:PaymentMeans whose cbc:PaymentMeansCode is 9.
The rule as published
Read the rule on the publisher's site
Business terms: BT-81, BT-84
Where this rule applies
| Rule set | Version |
|---|---|
| Peppol BIS Billing 3.0 (invoice) | 2026.5 |
| Peppol BIS Billing 3.0 (credit note) | 2026.5 |
Check your file
Drop your e-invoice to see whether IS-R-006 still fails, and which other rules do.
Related rules
- BR-61 Payment by transfer needs an account number
- BR-DE-19 A SEPA credit transfer needs a valid IBAN
- DE-R-019 A SEPA bank transfer should name a valid IBAN
- IS-R-007 Bank transfers from Icelandic sellers need a 12-digit account
- BR-49 Payment means code is required
- BR-50 A credit transfer needs an account number