Return to vendor question

Dear experts,

I have the following business process:

1. I create a return to vendor purchase order

2. I create a O/B delivery and interface this towards a logistics service provider

3. The logistics service provider will post a goods issue based on the RTV order

I do have one issue: the return reason is only captured in the o/b delivery. My question is, is there any way to record the return reason inside the return PO? Is there another workaround?

Thanks, M