The name given to dealings between major banks.Â Â Inter Bank Agency Agreement (IBAA) These are bi-lateral arrangements between banks. They principally provide a service offering of certain branch counter services to another bank's customers by prior arrangement. They facilitate an essential service that enables businesses that find the accessibility of their own banks branches difficult - for example due to location or size. The nature and range of the counter services offered is at the discretion of the providing bank. The banks charge each other on a reciprocal basis after another bank's customer uses the agreed counter services.