Add a unique invoice number to the ID element. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.

Is BR-02 a critical error?

Yes, BR-02 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.

Can BR-02 be automatically fixed?

BR-02 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.

Which accounting software causes BR-02?

BR-02 is commonly seen in exports from All invoicing software. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.

Error codes · EN 16931

BR-02Fixable here

Invoice must have an invoice number

This is the rejection, word for word: „[BR-02] Every invoice must contain a unique invoice number (ID) to identify the document.“

What to have readyInvoice Number

What we doAdd a unique invoice number to the ID element.

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

If you enter it yourself in your invoicing software

Before

<cbc:ID></cbc:ID>

After

<cbc:ID>INV-2026-001234</cbc:ID>

What the finding looks likeExample

FindingValue missing · BR-02

Location/Invoice/cbc:ID

From youInvoice Number

ThenPassed

ProofSHA-256 and /verify link after the check

Often appears together with

BR-03Invoice must have an issue date BR-04Missing invoice type code