Automated Invoice Payment Reminders with Google Sheets & Gmail

This workflow automates invoice payment reminders by running daily via a schedule trigger. It reads invoice data from Google Sheets, including columns like InvoiceID, ClientName, ClientEmail, Amount, DueDate, and Status. A function node filters for invoices due within 3 days or overdue up to 7 days, skipping paid ones, and prepares custom email subjects and bodies. An IF node checks if any reminders are needed; if yes, it proceeds to send personalized emails via Gmail for each qualifying invoic