You can find your security settings for CV2, AVS & 3D Secure by logging into the MMS and navigating to Account Admin > Account Settings
Your security settings are set to this strictest level by default
CV2 - Fail Transaction when CV2 is incorrect
AVS - Fail Transaction when address or Post Code are incorrect
3D Secure - Enabled on all transactions, and fail transaction when when 3D Secure enrolment check fails
Should you wish to reduce the security settings you have the choice to do so here.
If you have any further questions please contact firstname.lastname@example.org