Originally Posted by
tmiw
HK also doesn't have the tipping culture that the US does. A few instances of servers getting stiffed due to the terminal prohibiting tip adjust (not saying that this is happening, but per MC rules it is possible) would probably either get restaurants to disable PIN entirely or simply stop accepting such cards. Of course, that becomes less viable the more of those cards that exist.
Alternatively I suppose they could just rerun the transaction and let customers enter the tip on the terminal but I haven't really seen that happening unless it's something already customer-facing.
actually the spa i frequent has pin preferring terminals and the way it works is the same as it is for signature-chip us cards. I get the receipt write the tip in manually and they do a post adjust. The only difference is instead of asking for a signature it says no sig required pin verified. Isnt it also against merchant requirements to authorize for the possible tip?