A method of disclosing transaction information to customers includes receiving at a host computer system a file comprising processing information. The processing information comprises a plurality of transaction categories and fee information associated with each transaction category. The method also includes receiving a message from a point-of-sale device requesting the fee information associated with at least one particular transaction category relating to a transaction with a customer and sending from the host computer system an electronic message comprising the fee information. The method further comprises displaying transaction information relating to the electronic message at the point-of-sale device and providing the customer the opportunity to cancel the transaction. The transaction may involve an exchange between at least two different forms of value.