How to generate AP Payment Requests for customer refunds across different AR and AP BUs?

Summary:

In our current Oracle Fusion Enterprise Structure, AR Business Units are aligned
at the company level, whereas AP Management BUs are structured differently.

When a customer refund is initiated from an AR BU, the system cannot automatically
generate an AP Payment Request unless Payables and the required Common Options
are enabled for that AR BU. However, the client does not want to enable
Payables for the AR BUs, as AP transactions should continue to be managed
through the existing AP Management BUs.

This issue impacts both internal (intercompany) and external customer refunds.
Currently, intercompany refunds must be processed manually. In Phase 2, when AR