What it means
When an invoice between a Danish seller and a Danish buyer uses payment means code 93 (FIK) and the payment reference (BT-83) starts with 71# or 75#, the whole reference must be 18 or 19 characters. That is the 3-character prefix plus an instruction ID of 15 or 16 digits. The check counts characters; it does not look at whether the rest are digits.
Why it matters
The instruction ID is what the FIK payment is matched on. A reference of the wrong length cannot be used for that, so the invoice is rejected.
How to fix it
Look at the payment reference in the payment details of the invoice. After 71# or 75# it needs an instruction ID of 15 or 16 digits. Check for a missing digit, a digit too many or a stray space, and count the total, which must be 18 or 19 characters.
The rule as published
Read the rule on the publisher's site
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 DK-R-011 still fails, and which other rules do.
Related rules
- DK-R-013 Party identifiers on Danish invoices need a scheme identifier
- DK-R-014 A Danish seller's company registration number must use scheme 0184
- DK-R-016 Danish credit notes cannot have a negative amount due
- DK-R-017 A Danish buyer's company registration number must use scheme 0184
- DK-R-010 FIK needs a 71#, 73# or 75# reference and an 8-character number
- DK-R-009 Giro payment IDs with 04# or 15# need 16 digits after the prefix