The history of sending callbacks to your website is available in your EveryWallet account. You can identify notification statuses of each order in Merchant Processing > Orders section.
According to the delivery process, every callback has an appropriate notification status:
Delivered — notification is delivered successfully.
Skip Notification — no address specified in «Status URL».
Need Notification — notification for this order is in line to be sent. Within one store notifications are sent consecutively.
In Progress — notification is in process of being delivered at the moment.
Retry — notification requires resending as previous attempts failed.
Error — all 7 attempts to deliver notification failed.