WorldPay Corporate XML Direct is a direct payment gateway that allows you to accept credit card transactions within your site. 

This gateway supports the following features:

• Authorize
• Capture
• Purchase
• Refund
• Void
• Recurring payment

The following fields are required:

1. Register your server’s IP address with WorldPay.
2. MerchantCode
3. XML Password - Your API password and is different from your account password.

WorldPay by default automatically captures an authorized transaction. If you don’t want to automatically capture the funds after authorization, you need to configure the Capture Delay settings from their administration panel.

Any order modification such as capture, refund or void transactions are performed offline by WorldPay even when the Storefront receives a successful acknowledgement. You are therefore responsible to verify that the order modifications are eventually applied by WorldPay.