Checkout: Lucy Gateway« Payment Methods
The WordPress Shopping Cart plugin has the Lucy Payment Gateway (Cynergy Data) fully integrated and ready to use out of the box. This payment method stays on your site – it does not redirect your customers to the API site to complete the payment.
Setting up the LUCY payment gateway
In the text box provided, you can specify the title of the payment method as the customer will see on “Step 2: Billing” in the checkout process. You may want to specify that it is used for Credit Card payments, else just call it ‘Lucy Gateway‘ or similar.
2. Lucy Username
This is the Username you will have registered on the CynergyData Lucy Gateway site which links to your account. This is required to make sure that payments go into your account.
3. Lucy Password
This is the Password you will have registered on the CynergyData Lucy Gateway site which links to your account. This is required to verify your username for 
4. LUCY Server
Use the Staging/Developing server until you have completed the set up of your shop. Once you put the shop live and start getting customers to your site, you should revert to the Live Lucy Server.
LUCY Customer Experience
The above screenshot shows a generic page of what the checkout process will look like for your customers when completing an order using the Lucy Gateway. Customers will simply need to fill in the 4 fields seen and click the ‘Finish‘ button. The plugin will send their info to the CynergyData site where the funds will be added to your account and then Cynergy Data will send a message back to the plugin where the order will be marked as paid and completed – all this is done in a few seconds while the customer sees a ‘Processing Order/Payment‘ message – after which they will be redirected to a ‘Payment Completed‘ confirmation message.
NOTE: an SSL certificate is needed to process the payments so that the data is encrypted. You can read more on setting up SSL on your site HERE.