CF PayPal IPN is a plug and play piece of code which will enable you to track commercial transactions on your web site. Using PayPal's API you can easily take advantage of PayPal's Instant Payment Notification. When a user purchases something on your web site through PayPal, your database will be updated noting that the trasaction was completed. When this occurs your user can receive a personalized mssage from you regarding time frame for delivery. | 
