Automate Multi-Level Document Approvals with Supabase & Gmail

Automates structured multi-level document approval workflows using Supabase for data/storage and Gmail for notifications with approve/reject links and audit logs.

n8n
Automate Multi-Level Document Approvals with Supabase & Gmail

This workflow streamlines document approval processes for teams handling policies, contracts, proposals, or medical documents requiring multiple review levels. It starts with a form submission trigger, saving the document to a Supabase 'documents' table and storage bucket. It then dynamically fetches approval levels from 'workflow_levels', assigns approvers from the 'users' table based on roles, creates approval records with unique tokens and expiry times, sends Gmail notifications with direct approve/reject links, and logs every action in 'audit_logs' for compliance.

The process repeats iteratively through all defined approval levels until completion, ensuring no bottlenecks. It handles the full lifecycle from submission to final approval, reducing manual coordination and errors in sales pipelines or business operations.

Benefits include time savings on approval routing, enhanced audit trails for regulatory needs, scalability for adding levels, and easy customization (e.g., swap Gmail for Slack/Teams, adjust expiry). Ideal for sales teams managing pipeline documents, HR for policies, or any compliance-heavy environment. Setup requires Supabase credentials, predefined tables/buckets, and Gmail connection.

$22.99
Last updated October 3, 2026
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How to import this workflow into n8n

  1. 1Purchase or download the workflow to get the n8n workflow JSON file.
  2. 2In your n8n instance, open Workflows and choose "Import from File" (or paste the JSON with Ctrl+V on the canvas).
  3. 3Open each node marked with a credential warning and connect your own accounts and API keys.
  4. 4Run the workflow once manually to verify the data flow, then toggle it to Active.

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