Import a supplier invoice from an e-invoice file. The file must be a Factur-X PDF, a standalone UBL XML invoice, or a standalone CII XML invoice. Optionally provide invoice_options to pre-fill supplier and line-level data. Invoice line e_invoice_line_id must match Factur-X BT-126 (LineID) or the UBL/CII line identifier.

UBL and CII XML support is in alpha.

A 201 response confirms the file was accepted and parsed, but invoices imported via standalone UBL or CII XML have two known limitations:

• The uploaded file is not displayed in the app — no document preview is generated yet for these formats.
• The invoice is not recognized as an electronic invoice within Pennylane.

Factur-X PDF remains the recommended format for production use.

This endpoint requires the following scope: supplier_invoices:all