The SCA is a requirement of the EU. Read more about it at Wikipedia. It comes into force from 14 September 2019. However several EEA countries have announced that their implementation will be delayed until the end of 2020. For Visa and Mastercard credit cards this means that 3-D Secure 2.0 needs to be supported.

Since 01.01.2021 we support 3D Secure 2.0

Please ask your bank (or credit card issuer) if they support this as otherwise the initial sign up or when your credit card information needs to be change might be rejected.