n8n Workflow: Verify French Suppliers (SIREN/IBAN) with Sirenic + Google Sheets + Slack

Automatically verify French suppliers (SIREN/IBAN) and alert your team in Slack

This n8n workflow watches a Google Sheets payment list for new French suppliers, verifies each one with Sirenic (French Pack) using their SIREN (and optional IBAN), then either logs “ready to invoice” back to Google Sheets or posts a detailed blocked alert to Slack.

What this workflow does

• Runs every minute when a new row is added to a selected Google Sheets worksheet (Google Sheets Trigger).
• Extracts the supplier SIREN and optional IBAN from the new row.
• Calls the n8n-nodes-sirenic community node to validate the supplier with Sirenic (French Pack).
• Checks Sirenic’s verdict field pret_a_facturer to determine whether the supplier is ready to invoice.
• If approved, appends an entry to a Google Sheets verification log including the supplier name, a timestamp, and `VIES VAT` status.
• If blocked, posts a Slack message to your chosen channel with supplier details and the closed-list reasons returned by Sirenic (including VAT/VIES and IBAN/bank hints when available).

Use cases

• Keep supplier onboarding compliant by verifying SIREN/IBAN before enabling invoicing.
• Reduce payment processing errors by detecting non-invoice-ready suppliers early.
• Give operations teams real-time visibility: approved suppliers are logged, blocked ones trigger Slack alerts.
• Maintain an auditable verification trail in Google Sheets for internal reviews.

Technical details

• Trigger: Google Sheets Trigger (monitors a worksheet for new rows; runs every minute).
• Verification: n8n-nodes-sirenicsirenic (Sirenic French Pack) with Sirenic credentials.
• Routing logic: if node checks Sirenic’s pret_a_facturer verdict.
• Outputs: Google Sheets append for approved suppliers; Slack notifications for blocked suppliers.