Simplifying Credit Memo Approval Flow Using AME For Multi Level to Single Level

I have observed that when a customer submits a dispute through the iReceivables portal, the request is routed through multiple approval levels. Currently, it first goes to the Collector, then to another assigned user, followed by the Sales Manager, and finally reaches the Receivables Manager.

However, I need to setup for credit memo automatically created and sent to the customer as soon as it is approved by a single designated approver. I would appreciate guidance on how we can configure this streamlined approval process.

Currently, I have set up three transaction types:

Receivables Credit Memo – Collector
Receivables Credit Memo – Approval Chain