Shopify Return Refund Automation with GPT-4o, Slack & Sheets (n8n)

Approve or flag Shopify refunds automatically—using GPT-4o, Slack, and Google Sheets (n8n)

This n8n workflow automates Shopify return/refund decisions: it receives a return request via webhook, evaluates the case with GPT-4o, auto-approves where appropriate, escalates exceptions to Slack, and logs everything to Google Sheets.

What this workflow does

• Receives return/RMA requests through a webhook (POST) at the workflow path /shopify-return, including at least order_id and reason.
• Fetches order context from Shopify by calling the Shopify Admin API to retrieve the related order (and any included customer context) required for decisioning.
• Computes return metrics, including days since order creation, order total, and the customer’s historical return rate.
• Calls OpenAI (GPT-4o) with the return details and computed metrics to generate a structured JSON decision (refund type, rationale, and fraud risk).
• Routes the outcome based on the AI result:
  • Auto-issues a refund in Shopify for approved cases.
  • Posts exceptions to Slack (e.g., #returns-review) for manual review/denial when needed.
• Logs every RMA to a Google Sheets “RMA Log” sheet and returns the decision as JSON in the webhook response.

Use cases

• Cut down refund review time by auto-approving low-risk return requests.
• Escalate potential fraud or out-of-policy RMAs to your returns team in Slack.
• Maintain an auditable RMA history in Google Sheets for reporting and process improvement.

Technical details

• n8n nodes: Webhook, HTTP Request (Shopify Admin API), Code, Switch, Slack, plus supporting nodes (e.g., Sticky Note).
• Integrations: Shopify Admin API, OpenAI GPT-4o, Slack, Google Sheets.
• Setup highlights: configure your return portal/Shopify app to send return requests to the webhook URL, add Shopify API authentication, and provide an OpenAI credential for GPT-4o.