Security Deposit From Supplier

Hi All

I have a specific requirement in Payables module. We receive Security from our Supplier.I want to capture the same in Payables module.

We create a Credit Memo and receive that Payment in my bank through Refund Payment method. If I querry the supplier balance from Invoice screen we don't find any amount or Invoice .Even the Calculated Balance shows 0.00 amount. In real sence the amount is due and it should be shown as negative balance.Please help me in knowing how should I capture this typical scenario of receiving Advance from customer.

Thanks

Uday