When you pay with American Express in our online shop, the order processing is additionally secured by SafeKey. The SafeKey process can only be used by merchants who have been verified by American Express. A security check is carried out towards the end of the order process, and a TAN will be sent to you to confirm the transaction. You will receive this TAN via the SMS and/or email address that you have stored with American Express - an additional or further registration is not required. A further advantage of SafeKey is paying with points: with the Membership Rewards option, you can pay for your credit card transaction - in whole or in part - with the points you have collected.