ZUGFeRD invoice is valid, but IBAN seller is empty

[swnck]

The ZUGFerD PDF including XML is valid, even though it does not contain the invoicing party's bank details. This means that the invoice cannot be paid.

<ram:SpecifiedTradeSettlementPaymentMeans> <ram:TypeCode>31</ram:TypeCode> <ram:Information>innerhalb 14 Tage netto</ram:Information> <ram:PayerPartyDebtorFinancialAccount> <ram:IBANID/> </ram:PayerPartyDebtorFinancialAccount> <ram:PayeeSpecifiedCreditorFinancialInstitution> <ram:BICID/> </ram:PayeeSpecifiedCreditorFinancialInstitution> </ram:SpecifiedTradeSettlementPaymentMeans>

[swnck]

Both places are empty and the payment method is 31 (direct debit), so I cannot pay this invoice and the validation should fail.

en16931:2027: