I heard that ATMs in Argentina only accept 4 digit pin. However, both my credit card and my maestro card have 6 digit pins. Should I change the pin to a 4 digit pin before going to Argentina?
They have HSBC in Argentina, HSBC ATM machines can deal with 6 digits pin code (first hand experience in various countries since I hold an HSBC card with 6 digits pin code). I think it is safe to assume that you can use your card with 6 digits pin code at least in HSBC's ATMs, also I have noticed that all HSBC ATM machines use the same software.