You must configure your Amazon developer account for IPN so that the module will be notified when the payment has been completed.
- Log in to the Amazon Payments web site at http://payments.amazon.com.
- Click Edit My Account Settings.
- The Edit My Account Settings page displays.
- Click Manage Developer and Seller Preferences.
- The Manage Developer and Seller Preferences page displays.
- Enter the URL for your IPN server in the URL for Instant Payment Notification text box. You will get the URL for IPN from the module installation file