What is 3D Secure?

3D Secure is an extra security check that your bank runs on some online card payments. It confirms that it's really you using the card.

When your bank asks for it, a window from your bank opens inside PlayHouse while you pay or save a card. Depending on your bank, you might enter a one-time code sent by text, approve the payment in your banking app, or use another method your bank offers. The window closes by itself once your bank confirms.

If you cancel the check or your bank declines it, the payment doesn't go through and nothing is added to your wallet. Close the window and try again in a few minutes, or contact your bank if it keeps failing. See What should I do if my payment fails?