 <p>Once buyer login to their paypal account during checkout, the buyer will be able to see their email and shipping address as shown in the image for PayPal Payment Standard buttons such as buynow, addto cart.</p> <p>If you are using Express checkout Integration, you can use <a href="https://developer.paypal.com/docs/classic/api/merchant/GetExpressCheckoutDetails_API_Operation_NVP/" rel="nofollow noreferrer">GetExpressCheckoutDetails</a> API to retrieve the buyer information and display in the order summary page on your website(not in paypal checkout page). <img src="https://i.stack.imgur.com/XsKkt.jpg" alt="enter image description here"></p>