Comment by jimmux

Back around 2008, I recall having problems because my Australian cards would be prompted for a 5-digit zip code. It only happened at gas stations for some reason. The closest we have is 4-digit postcodes, which it wouldn't accept. Eventually, I figured out I could prepend a 0, but I didn't want to trial-and-error that unless it set off a fraud flag with my bank. Probably a good thing it was pre-pay in the cases that didn't work.