Your account may be configured so that DalPay Retail order alerts are automatically posted to a remote URL, e.g. a script hosted on your web server, when various order events occur in the life cycle of your orders.
DalPay Server Notifications are equivalent to Authorize.Net's Silent Post, PayPal's Instant Payment Notifications (PayPal IPN), WorldPay's Payment Response, Amazon Payments' Instant Order Processing Notifications (IOPN), 2Checkout's Instant Notification Service (2CO INS), Nochex's Automatic Payment Confirmation (APC), or ClickBank's Instant Notification Service.
The DalPay Merchant Server Notifications integration manual is here: DalPay Merchant Server Notifications Guide (1.7Mb PDF)
If you would like to implement this functionality you may configure the options via 'order pages' > 'Server Notifications' from the Seller Menu.