fatalPeppol BIS Billing 3.0profileUBLBG-19BT-81
If "Payment means type code" (BT-81) contains a code for direct debit (59), "DIRECT DEBIT" (BG-19) shall be provided.
The payment means code says direct debit (59), but the matching DIRECT DEBIT (BG-19) group is missing, so the buyer has no instructions to pay by that method.
Add DIRECT DEBIT (BG-19) with its details — for a transfer the IBAN (BT-84), for a card the masked PAN and holder name, for a direct debit the mandate reference and the debited account. Or change BT-81 to the method you actually mean.
UBL — context (/ubl-invoice:Invoice/cac:PaymentMeans[cbc:PaymentMeansCode = 59] | /ubl-creditnote:CreditNote/cac:PaymentMeans[cbc:PaymentMeansCode = 59])[$supplierCountryIsDE and $customerCountryIsDE]
cac:PaymentMandate