What causes the BR-29 error?

The seller must have a VAT identifier or tax registration number.

Add seller VAT number in PartyTaxScheme. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.

Is BR-29 a critical error?

Yes, BR-29 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-29 be automatically fixed?

Many instances of BR-29 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including seller vat identifier or tax number required.

Which accounting software causes BR-29?

BR-29 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-29Fixable here

Invoice period end date before start date

This is the rejection, word for word: „[BR-29] The Invoicing Period End Date (BT-74) is before the Start Date (BT-73). The end date must be on or after the start date.“

XPath: /Invoice/cac:InvoicePeriod/cbc:StartDate and /Invoice/cac:InvoicePeriod/cbc:EndDate. Dates use YYYY-MM-DD format (ISO 8601).

What to have readyThe missing value from your purchase order, contract or bookkeeping.

What we doInvoice Navigator automatically fixes this Invoice compliance issue by updating the relevant XML elements.

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

<Invoice>
  <!-- Issue: If both Invoicing period start date and end date are given t -->
</Invoice>

After

<Invoice>
  <!-- Issue resolved per EN 16931 -->
</Invoice>

What the finding looks likeExample

FindingValue missing · BR-29

Location//cac:InvoicePeriod

From youThe missing value

ThenPassed

ProofSHA-256 and /verify link after the check

Often appears together with

BR-07Invoice must have buyer name BR-CO-26The invoice is missing seller identification. At least one of: Seller...