Automate Pennylane Invoice Alerts with Slack Notifications

Stop manually checking Pennylane for invoice payments and overdue accounts. This n8n workflow automatically monitors your Pennylane invoices every 15 minutes and sends instant Slack notifications when invoices are paid or become overdue, keeping your French accounting operations running smoothly.

What this workflow does

The automation connects directly to Pennylane's API to fetch all customer invoices and intelligently classifies them into three categories: paid, overdue, and upcoming. When the workflow detects newly paid invoices or identifies overdue accounts, it immediately sends a summary notification to your designated Slack channel. If all invoices are current, the workflow completes silently without unnecessary alerts.

Running every 15 minutes, this Pennylane automation ensures you never miss critical invoice status changes. All invoice classification happens client-side through a custom code node, since Pennylane's API doesn't support direct status filtering.

Use cases

• Accounting teams wanting real-time alerts for invoice payments without constant Pennylane monitoring
• SaaS operators managing French billing operations who need immediate overdue invoice notifications
• Finance managers requiring automated cash flow monitoring integrated with team communication channels
• Small businesses using Pennylane for invoicing who want to improve payment collection efficiency

Technical details

This n8n workflow utilizes HTTP Request nodes for Pennylane API integration, Code nodes for invoice classification logic, Slack nodes for notifications, and Schedule Trigger for automated execution. The workflow requires a Pennylane Essentiel plan or higher with API access and a token scoped for customer_invoices:all permissions.

Setup involves creating Header Auth credentials with your Pennylane Bearer token, configuring your Slack channel in the notification node, and optionally adjusting the 15-minute polling interval. The workflow can be customized to use alternative notification channels like Telegram or email instead of Slack.

Part of a comprehensive 3-workflow Pennylane billing automation suite, this invoice alert system streamlines your French accounting workflow management and eliminates manual invoice monitoring tasks.