All the payment companies that we have support for (First Data, Authipay, Lloyds, Barclays, Ingenico etc.) all are using the new PSD2 requirements.
To learn more about this, you can refer to this link: https://en.wikipedia.org/wiki/Payment_Services_Directive
The rules on taking payments online have changed, the rules are here to better protect consumers when they pay online and also merchants from online fraud.
There is a fair bit of information online about PSD2, SCA – Strong customer authentication, and 3D SECURE V2 authentication.