With paydirekt, you can use photoTAN or mobileTAN.  

Online payments are confirmed by user name and password. In addition, you can also decide to secure your payments by TAN. In rare cases, we let you confirm a payment by TAN for your own safety. Moreover, you need a TAN for confirmation of changes to your data in the paydirekt portal.         

With the preferred security procedure, you choose the TAN procedure that you want to use for paydirekt. This is valid for orders or changes in the paydirekt portal.          

With this option, you can choose whether you want to confirm every paydirekt payment by TAN. Every payment is confirmed by the preferred security procedure that you chose. You can change this setting at "Change user data" at any time.