Lago's role in the French e-invoicing reform

Lago is not a plateforme de dématérialisation partenaire (PDP) under the French e-invoicing reform, and it is not listed in the approved PDP registry. This is expected and not a gap. Lago is a billing engine that generates the compliant invoice documents a PDP requires; it does not transmit invoices to the tax authority (DGFiP/PPF) directly.

How it works

The French e-invoicing reform (réforme de la facturation électronique) requires businesses to route invoices through a certified PDP. Lago's role sits one layer earlier: it produces the structured invoice formats a PDP expects. There are two, both generated for invoices, credit notes, and payment receipts:

• Factur-X: a PDF/A-3 file with an embedded XML compliant with the EN 16931 standard.

• UBL EN 16931: a standalone XML invoice.

To complete the compliance chain, you select a PDP of your own and route Lago's output through it. The two layers work in tandem, not as alternatives.

Where to find the output

E-invoicing must be enabled on your account before the files are available. Once enabled, you can retrieve them two ways.

In the UI, open a customer, go to the Invoices tab, click the menu on any invoice, and choose "Download XML" for the UBL or Factur-X XML, or "Download PDF" for the Factur-X PDF/A-3.

Through the API, call GET /api/v1/invoices/{lago_id}/download_xml for a signed XML URL, or GET /api/v1/invoices/{lago_id}/download_pdf for the PDF.

The "Download XML" option appears only once e-invoicing is enabled on the organization. If it is missing, check the e-invoicing activation setting in your organization configuration.

This article reflects guidance drawn from customer case resolutions. It is not officially supported documentation and may not apply to all situations.