Les Arbres Web Solutions

The Revised Payment Services Directive (PSD2) requires Strong Customer Authentication (SCA) for online payments made by European customers. Strong Customer Authentication means that a payment must be authenticated by two out of three things: something you know, like a password, something you own, like your phone, and something you are, like a fingerprint. You can find many more detailed guides on the web. This page shows the PSD2 status of the various payment gateways used by Payage. Here's what we know about the gateways that we support:

PayPal has information about PSD2 and SCA here. It's clear that hosted solutions are being taken care of by PayPal without any changes required by us or by you.

Stripe Checkout is a hosted payment page solution that is fully PSD2 compliant. Stripe has has information about PSD2 and SCA here.

Legacy Version
The original integration used by Payage (Stripe Checkout Legacy Version) is not PSD2 compliant. If you still use this gateway you should upgrade to the newer "Stripe Checkout" gateway. Upgrading is easy. Please download the latest Payage user guide for more details.
As detailed here, Authorize.net does not support PSD2. This Payage gateway is deprecated.
Barclaycard has information about PSD2 and SCA here. We haven't found anything specific about the integration used by Payage, "Barclaycard ePDQ Essential", but since it is a hosted payment page, we assume that the payment page logic has been or will be upgraded.
Mollie has information about PSD2 here. Their payment pages are now fully PSD2 compliant.
Opayo has committed to upgrading their gateway to support PSD2 "in a way that minimises the changes our customers need to make".

We were not able to find a clear statement about the PSD2 compliance of this gateway.

This gateway did not support PSD2 and has now closed (link). This Payage gateway is no longer available.
We don't think that payments with cryptocurrencies are affected by PSD2.
Manual payments by cash, cheque, or bank transfer are not affected by PSD2.