A client said he was contacted by his POS reseller and one of the topics discussed was the upcoming PCI DSS change that makes a "Pre-Authorized" credit card transaction (typically at the Bar) a PCI No No. I wanted to ask what POS resellers are advising their clients regarding this change. If Bar owners can't keep the credit card behind the bar and can no longer perform a Pre-Auth; just how are they supposed to protect themselves from guests that somehow dissappear when payment is due.