Payment Action - PayPal UK Direct is an online payment method. Therefore, the credit card must be Authorized by the payment gateway when the order is submitted, in order for it to complete. However, you can choose whether you want to Authorize Only, or Authorize and Capture the payment simultaneously during the Order creation. If you choose to Authorize and Capture, an Invoice will automatically be created for the full quantity of items in the Order. For more information about Invoices, refer to Chapter 8: Managing Orders.
Credit Card Types - Select the options which will appear in the Credit Card Type drop-down on the frontend.
payment from applicable countries - Select which customers can use this payment method. All Allowed Countries means all customers from the default countries list can use this payment method. If you haven‘t already configured the default list, it can be done by navigating to System > Configuration, clicking the General tab, and selecting each country you wish to allow from the Allow countries menu. If you want to further reduce the number of countries from which your customers will be allowed to use this payment method, select Specific Countries. This means that only customers whose billing address includes one of the countries listed in the Payment from Specific countries list below can use this payment method.
payment from Specific countries - This list is inactive unless Specific Countries is selected from the Payment from applicable countries list above. It basically works as a filter, so that this payment method will only be listed for those customers whose billing address is one of these selected countries.
Sort Order - If you are choosing to allow multiple payment methods, this will determine in what order each method is listed in the front-end.
Account Information - To enable this as a payment method, you‘ll need a Website Payments Pro UK account. To get one, go to www.paypal.co.uk. It is free to register. You will receive the account information for this payment method, and it can entered in the PayPal Accounts tab, in the Website Payments Pro UK section. PayPal UK Express also requires and Website Payments Pro UK account, and these two methods will share the same account information, so you probably would not enable both methods at the same time.
URL - Enter the URL to which Magento will send the payment information. You can use the pilot URL to enable a test environment.
User - Enter the User name from your PayPal seller account.
Vendor - Enter the Vendor information from your PayPal seller account.
Password - Enter the Password from your PayPal seller account.
Debug Flag - If you select Yes, all requests between Magento and PayPal will be saved in the Magento database.
Functionality on Front-End and Back-End
When the customer selects this method from the payment method list, they will be required to enter the Name on Card, select the Credit Card Type, enter Credit Card Number, select the Expiration Date, and enter the Card Verification Number.