Upload an invoice spreadsheet, map your columns, and the relay validates against EN16931, transforms each invoice to UBL BIS 3.0 XML with embedded PDFs, then downloads them or delivers to an Access Point. One file can hold many invoices — they’re grouped by invoice number. Nothing is stored server-side; data lives only in this session.
CSV or Excel (XLSX/XLSM). One file can contain multiple invoices grouped by invoice number. Header data (buyer/seller) can sit on a second sheet, in a separate CSV, or be typed into the form below. Combined upload up to ~4 MB. Processed in memory, never stored.