- Payment Data Transfer (PDT) is a secure method to retrieve the details about a PayPal transaction so that you can display them to your customer. It is used in combination with Website Payments Standard, so that after a customer returns to your website after paying on the PayPal site, they can instantly view a confirmation message with the details of the transaction.
- Enable PDT for your PayPal account.
- Log in to your PayPal account.
- Click the Profile subtab.
- Click the My Selling Tools button in the left column.
- Find the Selling online section and click Update in the Website preferences row.
- Under Auto Return for Website Payments, click the On radio button.
- For the Return URL, enter the URL on your site that will receive the transaction ID posted by PayPal after a customer payment.
- Under Payment Data Transfer, click the On radio button.
- Click Save.
- Find the Selling online section and click Update in the Website preferences row again.
- Scroll down to the Payment Data Transfer section of the page and take note of your PDT identity token.
- Create a button. The PayPal buttons consist of a form which has a number of hidden key/value pairs and a submit button. You can find info on how to make those in their Website Payments Standard Integration Guide.
- A transactionId will be returned in the returnURL.
- POST request back to PayPal with TransactionId and PDT identity token as specified in scripts above in different language.
- Check the response. The first variable is 'SUCCESS' followed by PDT variables. if it is a failure, the first variable will be a 'FAIL'.
- More information on PDT can be found in the PDT integration guide.