Customer Bank Account in Refund Attributes form in Receipts window

We are looking at using the Refund functionality in AR to refund the customer payments.

We see in the refund attributes form, we have the party bank account field. But no value is present in LOV. We need DUMMY ACCT FOR VENDORS in LOV which is the one we setup in Vendor Master. How can we make this happen?

Could you please advise, what is the standard oracle functionality on the bank account field in Refund Attributes window.

Also, where does the Customer Address populate from, as the value is : ATTN: XXXX (PFA Screenshots)