Flag possible duplicate supplier invoices in Google Sheets before payment with Slack alerts

A free n8n workflow that runs on a schedule and connects Google Sheets and Slack.

About this workflow

This free n8n automation template runs on a schedule and connects Google Sheets and Slack. Shared by Jessy Mariau on the official n8n template gallery. Open the official template page to copy it into your own n8n account, then connect your own credentials before switching it on.

Apps and services it connects

  • Google Sheets
  • Slack

How to use this template

  1. Open the template, choose “Use for free” and import it into your n8n instance (cloud or self-hosted).
  2. Connect your own accounts and API keys for each app. The template never includes anyone's credentials.
  3. Run it once with test data, check the result, then switch it on.

The workflow itself stays on n8n's official template page. HEEEXY only describes it and links there.

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