Instant Payment Notification is a message service that notifies you about updates to your PayPal transactions. You can use it to automate administrative functions, such as fulfilling orders, tracking shipments, and providing status updates. Instant Payment Notifications can update you on the following items:    

• Instant payments (including Checkout and direct credit card payments).    
• eCheck payments.    
• Pending payments.    
• Recurring payments and subscriptions.    
• Authorizations.    
• Disputes, chargebacks, reversals, and refunds.

Here's how to configure an Instant Payment Notification (IPN) through PayPal:

1. Log in to your PayPal account.
2. Click Settings next to "Log out" and select Account Settings.
3. Click Notifications on the left.
4. Click Update next to "Instant Payment Notifications."
5. Click Choose IPN Settings at the bottom of the page.
6. The next screen contains a form that allows edits to the IPN settings. On the "Notification URL" field, enter the URL where the notification handler is installed. Refer to our Technical IPN Integration Guide for details.
7. Then, check "Receive messages from enabled IPN" and click Save.
8. Review your information and close the screen once you're done.