This contribution allows osCommerce store owners to provide real-time UPS, USPS and Fedex package tracking for their customers. Store owners just enter the tracking number into text box on the orders page inside admin. This should be done when updating the order status to "Shipped." The customer will receive an email as usual telling them the order has been updated. Included in the email is a link which takes them to their account page on your website. On the order details page, the customer will find a clickable link to track their package. The link will open in a new window, so the customer never leaves your website. If you do not want a customer to receive a tracking number, don't include one when updating the order.