Its opposite in my experience. Detuning error messaging will increase abandonment as users wont know how to recover from errors (Eg invalid CVV) - thereby decre

Its opposite in my experience. Detuning error messaging will increase abandonment as users wont know how to recover from errors (Eg invalid CVV) - thereby decreasing revenue. Its especially true where something like 3D secure is in use and failure messages varied. Ive also never seen risk based authentication based on MID in place at issuers (Im in SEA it could be different in more developed markets). Rather they have blanket bans on MID or categories of MID with high fraud-to-sales ratios. Payments processors and acquirers have fraud detection systems, but they will score not actively decline. So while someone abusing your service may land you in hot water, reducing their ability doesn't necessarily mean a higher authorization rate for regular transactions.