I’ve run into this a few times with cross-border projects, and the weird thing is that the “small details” usually end up being the major blockers. One case that still sticks with me was a flow where the card number field was visually fine but technically triggered a keyboard mismatch on Android — users had to switch keyboards manually to finish the input. Conversion jumped once we fixed something that simple. Another big win came from reducing friction around error states: instead of a generic red banner, we started showing inline hints directly under the problematic field, and the drop-off reduced almost overnight.
If you haven’t already, check out some of the materials and case breakdowns here — they have a few practical angles on layout decisions, payment steps, and user behavior in high-risk industries: monoup payment blog
. What helped us most was trimming the number of visible form elements at first glance. People panic when they see a “wall of fields,” so we grouped optional data behind small expanders. Funny enough, the actual checkout logic didn’t change, but users felt more at ease and completed it more consistently.