Step 1: Activate Payment Data Transfer (PDT) within your Pay Pal Account Properly To use PDT, you must activate PDT and Auto Return in your Pay Pal account profile. Log in to your Pay Pal account so you can get this list of HTML Variables for Website Payments Standard.
You can see debug messages in the Open Cart System log.
Click "Save."You might be prompted to turn on Auto Return in order to use Payment Data Transfer, or PDT. 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.
In your account, you need to enable Payment Data Transfer. Go to the Pay Pal website and log in to your account.2.
Click on the "Profile" sub-tab located at the top of the page.3.