How processing works
When a customer shops on your site, fills the shopping cart and proceeds to the checkout phase, this is what happens (see diagram on your right)
As you can see it’s quite an involved process with many steps that seem to happen instantaneously. First Citizens Bank must first provide your Merchant ID (MID) to connect to the gateway provided by First Atlantic Commerce.
Because your customer is directed to a hosted payment page, one of the security requirements for this is the need to have an SSL Certificate from a major provider like GeoTrust, Verisign or Thawte. FORWARD MULTIMEDIA recommends GeoTrust and have used it on all sites integrated so far without issue and it is affordable.
Cost of the payment solution
Apart from the transaction fees incurred after they gateway goes live on your site, each bank has their own set-up fees and monthly fees. However, there is a one-time integration cost for implementation and testing of the gateway to your Magento website.