A client of ours had a customer click on the link that is on the confirmation email once an order is placed to "click here to update your billing information". Once they did this, they were charged for the item "Update your customer Information" which had no cost associated with it, but a shipping charge of $11.58! We had to reverse this charge in authorize.net.
Client: Classical Pearls
Date of Transaction: August 15, 2013 (transaction ID 114619589)
Let us know if this has been an issue before and how to resolve it.