A method of verifying the identify of an affiliate enrolled in an affiliate program of a merchant and then transmitting information between the affiliate and the merchant is provided. The method relies on embedding a unique identification code in a sub-domain portion of a domain name. Once an identification process has been completed, a server-to-server exchange of information is able to freely continue throughout a shopping session and even beyond checkout to easily handle post transaction changes, returns, cancellations, modifications, shipment notifications, status notifications, and the like.