What it means
When the seller and the buyer are both in Denmark, every identifier given for the seller (BT-29) or the buyer (BT-46) must come with its scheme identifier (BT-29-1 or BT-46-1). The scheme is a short code that says what kind of number the identifier is. The check fails when an identifier is given and its scheme is missing or empty. It applies to invoices and credit notes.
Why it matters
An identifier without a scheme is only a string of characters. The recipient cannot tell whether it is a CVR number, a GLN or something else, so it cannot use it, and the invoice is rejected.
How to fix it
Open the seller or buyer details in your invoicing software and find the identifier and its type or scheme. Choose the scheme that matches the number, for example 0184 for a CVR number or 0088 for a GLN. If you do not need the extra identifier, remove it.
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-013 still fails, and which other rules do.
Related rules
- 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-011 FIK references with 71# or 75# need 15 or 16 digits after the prefix
- 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