Is UBL-SR-21 a critical error?

Yes, UBL-SR-21 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted.

Can UBL-SR-21 be automatically fixed?

UBL-SR-21 requires manual correction. Review the fix steps above for guidance.

Error codes · EN16931

UBL-SR-21In your invoicing software

Payee legal registration identifier shall occur maximum once, if the Payee is different from the Seller

This is the rejection, word for word: „[UBL-SR-21] Your invoice contains multiple Payee legal registration identifiers (PayeeParty/PartyLegalEntity/CompanyID). EN16931 allows only one.“

What to have readyNothing. The file has to be re-exported from your invoicing software; we check it again afterwards.

What we doYour invoice contains multiple Payee legal registration identifiers (PayeeParty/PartyLegalEntity/CompanyID). EN16931 allows only one.

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.

What the finding looks likeExample

FindingStructure invalid · UBL-SR-21

Location/Invoice/cac:PayeeParty/cac:PartyLegalEntity/cbc:CompanyID

From youA re-exported file

ThenRe-export

ProofSHA-256 and /verify link after the check