Visa and Mastercard fees are absolutely disclosed to customers, as a matter of course. In fact Australia implemented a law a couple of years ago that retailers

Visa and Mastercard fees are absolutely disclosed to customers, as a matter of course. In fact Australia implemented a law a couple of years ago that retailers who pass the processing fee to customers must only charge the actual fee itself and not an arbitrary "CC fee" (some retailers had been charging ridiculous fees like $5 or 15% previously). So by law these fees must be available to the public. https://www.accc.gov.au/media-release/excessive-payment-surcharge-ban https://www.accc.gov.au/media-release/excessive-payment-surc...