https://userapps.support.sap.com/sap/support/knowledge/en/3676245
3676245 - How to populate QR-IBAN and QR-REF fields using BAPI_ACC_DOCUMENT_POST | SAP Knowledge...
There is the requirement to populate QR Bill related fields to BAPI_ACC_DOCUMENT_POST during posting of accounting documents (AP invoices) for Switzerland.