OFT slams ‘too high’ Visa fees October 20, 2005 The Office of Fair Trading (OFT) stepped up its assault on British banks yesterday, announcing an in-depth inquiry into Visa fees. The investigation relates to so-called “interchange fees” which are levied by high street banks on retailers when they process Visa credit card transactions. In a related investigation into Mastercard fees, the OFT last month [...]