A bank confirmation letter (BCL) is a correspondence between banks that confirms the existence of a valid line of credit to one of its customers. You can download your own letter from your student record to supply proof that you are a student at King's.Free Bank Confirmation Letter Template. A clear and concise balance confirmation letter is crucial for maintaining accurate records, preventing disputes, and ensuring smooth financial transactions. Customize and Download this "Reservation Confirmation Letter". For example, a prospective home buyer decides to buy a different home than the one specified in the bank confirmation letter; a new BCL would be needed. That your Bank Confirmation requests are handled in the most timely and efficient manner. FORMAT OF BANKER'S VERIFICATION LETTER. You may also have your letter couriered or faxed at an additional charge.