How can I configure a default bank account - to which the invoice will be paid - per customer?

I am not talking about customer's bank account but my company's bank account that would be selected when creating invoice.

Right now, once invoice is created, I can select a bank account in "Other Info" tab (Odoo V7) but I would like to have a default bank account for each customer. I did not find anything in customer view/model. (except supplier's bank accounts)

Mathieu