The Strong Customer Authentication regulations are complex and are not a comfortable fit for the card-payments industry. The industry at large, including the card schemes, have struggled to adapt in time for the September 14 deadline date. The requirements of the Regulators was not made clear until Q1 2019 which had knock on effects throughout the eco-system. The inevitable impact of this is that despite best efforts, some of the required work will slip beyond the September time period.
If this is the case for you, as a customer of GP, we will be in contact regarding the proposed release date for your acquirer, and the good news here is that we have coverage of 3DS1 across almost all of our acquirer connections to date which will ensure merchant impact is kept to a minimum.