I want to order some items online from a US company to shop to U.K. (quite well known company) and pay by credit card. They do have option to add to basket and check out but as I have received a discount and shipping is calculated separately, the options to pay offered were to complete credit card authorisation form and return via email... I don't feel this is a safe way. Am I correct? If so, can anyone advise how I should pay safely please l?