Validate and enrich refund approval requests in an n8n sub-workflow

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Built by Elvis Sarvia Elvis Sarvia
Created on October 05, 2026

Description

Quick overview
This sub-workflow validates a refund approval request and adds simulated customer context before an AI agent drafts a proposal. It is called by the Exercise 5 parent workflow from the n8n Production AI Playbook on Audit & Trace.

How it works
When Executed by Another Workflow receives the request from the parent workflow and passes the input through.
Validate Request, an If node, checks for a non-empty requestId and reason and a positive whole-number amount in cents.
Invalid requests stop at Reject Request, a Stop and Error node, so the parent execution fails with a clear error.
Enrich Request, an Edit Fields node, returns the request with a simulated customer tier and prior refund count.

Setup
Import this workflow, save it, and publish it so the parent workflow can call it.
Import the Exercise 5 parent workflow, Trace a human approval across a wait, and select this workflow in its Enrich Request Sub-workflow node.
No credentials are needed for this sub-workflow.
With OpenTelemetry tracing enabled, its workflow span appears nested under the parent workflow span in your trace viewer.

Requirements
n8n Cloud or a self-hosted n8n instance
The Exercise 5 parent workflow

Customization
Replace the simulated values in Enrich Request with a lookup against your CRM or billing system.

Additional info
Customer data is synthetic.

This workflow was created by Elvis Sarvia and shared publicly on the n8n community template library. n8nFind indexes it for discovery — the workflow remains the property of its original creator.