Payment Data Transfer enables merchants using PayPal Payments Standard to display order-related information for customers on the merchant's site. The page confirms the customer's payment was successful and displays transaction details. Merchants can also use the web page to automatically fulfill orders for digital goods.
You can create the PDT in your PayPal account:
Users with the old Paypal user interface:
A confirmation message will appear at the top of the page indicating that you have successfully enabled Payment Data Transfer. Your identity token will appear within that message, as well as below the PDT On/Off radio buttons.
Additional Notes: * You must enable Auto Return if you are going to use PDT * If you already have PDT enabled per the instructions above, to see your token, follow steps 1-3 above. Once you are in the Website Payment Preferences area of your account, you can view the token below the PDT On/Off section.
For information see the PayPal Developer page: https://developer.paypal.com/webapps/developer/docs/classic/products/payment-data-transfer/
Setting up the Auto Return Page
Auto Return Overview With Auto Return for Website Payments, your buyers are redirected back to your site immediately after clicking the Pay button on the Payment Confirmation page.
Auto Return applies to all PayPal Website Payments, including Buy Now, Donations, Subscriptions, and Shopping Cart.
Your buyers enjoy a streamlined checkout experience and are returned back to your site quickly!
Setting Up Auto Return To set up Auto Return:
Instant Payment Notification (IPN) is PayPal's message service that sends a notification when a transaction is affected. Once IPN is integrated, sellers can automate their back office so they don’t have to wait for payments to come in to trigger order fulfillment.
IPN can send notifications for these transactions:
As PayPal’s interface for handling purchase confirmation and server-to-server communications, IPN can also be used to manage and customize a variety of APIs and communications, including:
How to set up: