What causes the BR-52 error?

InvoiceTypeCode must be a valid UNTDID 1001 document type code.

This requires user input to resolve. Provide the correct value for `cac:AdditionalDocumentReference` (BG-24). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.

Is BR-52 a critical error?

Yes, BR-52 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-52 be automatically fixed?

BR-52 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-52?

BR-52 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-52Fixable here

Supporting document reference required

This is the rejection, word for word: „[BR-52] Each Additional supporting document (BG-24) shall contain a Supporting document reference (BT-122).“

What to have readyInvoice Type Code

What we doThis requires user input to resolve. Provide the correct value for `cac:AdditionalDocumentReference` (BG-24).

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>
  <cac:AdditionalDocumentReference><!-- invalid or missing value --></cac:AdditionalDocumentReference>
</Invoice>

After

<Invoice>
  <cac:AdditionalDocumentReference>correct-value</cac:AdditionalDocumentReference>
</Invoice>

What the finding looks likeExample

FindingValue missing · BR-52

Location/Invoice/cbc:InvoiceTypeCode

From youInvoice Type Code

ThenPassed

ProofSHA-256 and /verify link after the check

Often appears together with

BR-04Missing invoice type code