Automated Invoice & Payment Reminder System for Clients

This workflow automates the entire invoicing and overdue payment reminder process for clients using n8n. It consists of two main processes: the monthly invoice creation and a daily overdue payment reminder check. The workflow connects to Google Sheets to retrieve client and invoice data, filters active clients and overdue invoices, generates new invoice data, and logs all activities. Invoices are sent via email upon creation, and overdue invoices trigger a series of reminders based on how long they have been overdue, varying from gentle follow-ups to final notices. This setup streamlines billing operations, reduces manual effort, and improves cash flow management for businesses.