Ordering party in PO

Dear Experts ,

I want to mention the name of the ordering pary in the PO . The ordering party is just the agent with whom no invoices / bills are exchanged . It is just acting as an agent . Hence i dont want to make the PO in the name of the ordering party . But still somehow want to mention its name in PO .

How & where can i do it & what will be the configuration required in this case??

Regards