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

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 1. When Executed by Another Workflow receives the request from the parent workflow and passes the input through. 2. Validate Request, an If node, checks for a non-empty requestId and reason and a positive whole-number amount in cents. 3. Invalid requests stop at Reject Request, a Stop and Error node, so the parent execution fails with a clear error. 4. Enrich Request, an Edit Fields node, returns the request with a simulated customer tier and prior refund count. Setup 1. Import this workflow, save it, and publish it so the parent workflow can call it. 2. Import the Exercise 5 parent workflow, Trace a human approval across a wait, and select this workflow in its Enrich Request Sub-workflow node. 3. No credentials are needed for this sub-workflow. 4. 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.