I see that this same question was asked almost a year ago here: https://community.clover.com/questions/23416/is-there-a-way-to-modify-placeholder-for-zip-input.html
I could not find any update or documentation indicating that this has been improved. Has there been any progress on this issue? Ideally it would say Zip/Postal Code or something that supports both US and CAN billing addresses.
Edit: I should add that the clover iframe features page shows this image but no instructions on how to modify the placeholder.