You are not understanding the problem in quickbooks. I have already turned on multi currency. When showing the 2 currencies on the invoice, correctly, the card reader will replace the foreign currency amound with a dollar sign. So, £33 is $40. When charging a credit card, the program replaces the £ with the $ sign and tries to charge in this example $33 instead of £33. Does theproblem seem to be clear now? I am having to put all invlices in USD in the UK because of this. Clients want to see how many sterling they are getting charged not USD, but we can't use the multi currency or we are going to go bankrupt if we try to show them £ amounts, because credit card reader wont charge the correct amount.