Oh sorry, I didn't realize you were an Affiliate and not a Seller. There is no way for Affiliates to obtain any buyer information directly, as the buyer is purchasing directly from the Seller, so the buyer's info is proprietary to the Seller, and moreover, revealing it to others may violate the Seller's Privacy Policy. Many Sellers are also concerned about the potential for shady Affiliates (or competitors posing as Affiliates) to steal away their customers, so this limitation prevents that as well. You can only ask the Seller to provide that information manually by referencing the Internal Transaction ID in your notification/logs (which should match up to the Invoice ID in the Seller's logs).