The Cloud Fulfilment dashboard gives you access to your sales history and provides you with a list of sales that need approval, are currently being picked, are in transit to your customer, have been delivered or there are problems associated to them.
This list provides a Cloud Fulfilment order ID, the date of the order, and the source - if you're using the multi-channel option this will show either eBay, Amazon, Play.com or your own website. You will also see the post code, the order status, how many products the order consisted of. This list will also give you the ability to track the order and view more details.
You can then use the information to cross-reference against your own system.