Categories / Invoicing/Collections/Cash Flow

Automate invoices, payments, and refunds

Business

Google Drive to store

Task

The setup was a single n8n workflow triggered by a webhook, with API-key validation up front and separate routes for invoice, payment, and refund events. It used Google Sheets for records, PDFbro to create invoice PDFs, Google Drive to store them, and Resend to send emails; befor

Result

The result was an end-to-end flow that kept invoice, payment, and refund handling in one orchestration layer while preventing duplicate records and duplicate notifications. The post frames it as a practical, reliability-focused example, but gives no performance metrics or business impact numbers.

Tools

• n8n
• Google Sheets

Setup

1. The setup was a single n8n workflow triggered by a webhook, with API-key validation up front and separate routes for invoice, payment, and refund events. It used Google Sheets for records, PDFbro to create invoice PDFs, Google Drive to store them, and Resend to send emails
2. before each path ran, it checked for duplicates, then updated statuses, links, balances, and timestamps after processing.
3. Catch: The main catch is that the design emphasizes [Card from agentusecases.ai summary
4. original not re-read this run.]

Source

agentusecases.ai ↗

Specifics rating

low specifics high = concrete numbers/quotes; med = partial; low = qualitative

Results as reported by the source; not independently verified.