Like with any card, for extra security you will likely be asked to go through 3DS authentication when making online purchases.
To do so, you will need to add your mobile number to your Ben cards so you can receive the necessary code for authentication.
To do so, head to your wallet, and then reveal card info. Once revealed, you will then be able to manage personal info which will show the section you see below;
By clicking on the pencil icon to the right, you can edit your mobile number;
Enter the number, confirm the change and you're all set! Also, if you have more than one card you only need to do this once for the number to be set on all cards! 🙂
If you're still having issues with your 3DS authentication, contact us at firstname.lastname@example.org or through the live chat.