I have one production merchant who continues to complain to me that their clients are getting double-charged.
I did some research...
Our system only shows a record of one approved transaction.
However, when we check the MercuryView Portal reporting, we're seeing two distinct Approved Sales with two Authorization Codes. It appears that they came through moments apart. According to the cashier, the system returned an error so they tried to process the transaction again and received an Approval.
What can we do to prevent this type of problem from happening?