Default Bank Account When Creating Customer Refund

Hi

When refunding customer receipts (or credit memos), I would like to know if there is a way to either:

1. Set the field Customer Party Bank Account to mandatory?
2. Automatically populate Customer Party Bank Account to any of the bank account on the Account or Site records?

Alternatively, is there a way to do this at the Payment Request (AP Invoice) og installment levels?

Thanks in advance!