| Sending | “Send to Billit” on the invoice, bulk action on the list, or on validation (option) | Invoice, replacement, down-payment, situation invoice or credit note created in Billit with its PDF, then sent over Peppol or the French network. |
| Pre-send checks | Shown on the invoice panel | Validated invoice, identifiable customer (VAT number, SIREN), reference of 35 characters at most in France, 0 % line with a reason, credit note linked to its invoice. |
| Statuses | Signed webhooks, hourly scheduled task as a safety net | Sent → delivered → accepted, or refused / error with the reason; audit trail on the invoice; journal with filters. |
| Reception | Hourly scheduled task or “Fetch now” | Received supplier invoices become drafts with PDF and attachments; supplier matched by VAT number, SIREN, SIRET or enterprise number, otherwise the invoice waits in the matching inbox. |
| Refusal | From the inbox, French network | A refusal with its reason is sent back to the issuer; the draft already created is kept. |
| Directory lookup | Button on the third party and on the invoice | Checks whether the customer can receive an electronic invoice (Peppol reachability). |