Our payment processor, Stripe, has implemented 3D Secure (3DS) to reduce fraud and meet regulatory requirements.
For extra fraud protection, 3DS requires some customers to complete an additional verification step with the card issuer when paying. As a result, 3DS allows us to comply with merchant regulations imposed by legislations such as those in UK, India and Australia.
If you'd like to learn more about 3DS, you check out the documentation from our payment processor here.