When you purchase something in a Facebook game, you get an Order ID.
This Order ID is specific to each purchase.
There are two ways to find your Facebook Order ID.
You get your Order ID when you receive a Facebook receipt in your mails
You get your Order ID on the online Facebook Receipt
To find your online Facebook receipt, please follow these steps
1. Go to the payments section of your Facebook account by clicking here :
https://secure.facebook.com/settings?tab=payments§ion=history&view
2. Click on the price of the purchase that you want more information on.
3. Find the Order ID in the Facebook receipt that appears in a new window.