Note: Please bear in mind that some customers find 3D secure authentication to be frustrating, and some people may not complete the checkout process if 3D secure authentication is required.  

To set your Voucher Connect store to require 3D Secure authentication for all payments on your store, you'll need to log into your Stripe dashboard.  Once you get in to your dashboard, over on the right sidebar you'll see a button labeled Radar.

If you click on that button, it will open a sub-menu where you can find another button called Rules. Click on that to open the rules panel. 

At the top of the rules panel you'll see the 3D secure controls. By default, 3D secure authentication is only requested when Stripe estimates the risk level is highest. 

If you would prefer to require 3D secure authentication on all payments made with supported cards, then click on the triple-dot menu button on the row that says Request 3D Secure if 3D Secure is supported for card. Click Enable to switch it on.  

A popup will appear, asking you to confirm your decision. Click the Enable button to proceed. 

That's all there is to it, you can close your Stripe dashboard whenever you're ready, and your customers payments will route through 3D Secure authentication when its available on their card.
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